HVAC – Semper Fi Heating & Cooling

Why Your AC Won’t Start, Stop, or Shut Off (and What You Can Actually Do About It)

Written by Semper Fi on May 9, 2025. Posted in Air Conditioner Troubleshooting, Air Conditioner Tune-Up, Air Conditioning, Air Conditioning Repair, Air Conditioning Replacement, HVAC, Maintenance.

Why Your AC Won’t Start, Stop, or Shut Off (and What You Can Actually Do About It)

Let’s be honest—AC issues always seem to hit at the worst possible time. Whether it won’t turn on, won’t stop running, or is working non-stop without cooling, it’s a headache you don’t have time for. But don’t sweat it (literally)—we’ve got the rundown of what might be wrong and how you can fix it yourself before calling in the pros.

So, Your AC Won’t Start?

If your AC isn’t starting, consider the following potential causes:

Thermostat Settings: Make sure it’s set to “cool”, and your desired temperature is set below the current room temperature. It’s simple but often overlooked.
Power Issues: Flip your breaker panel and check for anything tripped. A quick reset might do the trick. It could be as simple as that!
Clogged Air Filter: A dirty filter can constrict the airflow and trigger safety shutoffs. Try swapping it out and see if that solves the problem.
Emergency Shut-Off Switches: Look around the indoor and outdoor units—sometimes there’s a manual switch that’s been flipped off without you realizing it.
Blocked Drain Line: If the pan is full or the line is clogged, it might shut down for safety. Clear it out and you’re good to go.
Faulty capacitors or contactors: These store energy to start-up your system. If they’re failing, your AC may not start. You’ll need diagnosis and replacement from a pro.
Professional assessment: If you’re hearing weird sounds or nothing’s happening at all, the compressor could be dead. Time to get someone out to take a look.

Your AC Won’t Turn Off

If your system is running a marathon and refuses to quit, here’s what might be happening:

Thermostat Malfunction: If it’s misreading the temp or is outdated, it might not know when to shut off. Check to see if it’s functioning correctly.
Dirty Outdoor Coils: The coils help release heat. When they become gunky, your AC has to work overtime. Regularly clean them to help your system chill out.
Low Refrigerant: When there’s a leak, your AC can’t reach the set temp and just keeps running. If you suspect a leak, call in a professional tech.
Fan Limit Switch Issues: This switch controls your blower fan. If it’s stuck in the “on” position, the fan won’t stop. Get it checked by a professional.

It’s Running… But Your House Is Still Hot

This might be the most frustrating problem: your AC is running constantly, but you’re still sweating. Here’s what could be going on:

Wrong- Sized Unit: Too small and it never catches up. Too big and it cycles on and off too fast. You might need a new unit installation.
Leaky Ducts: Cooled air might be escaping through holes in the ductwork. If so, get them checked and have them sealed
Closed Vents or Blockages: Walk around and make sure none of your vents are closed or blocked.
Older System: If it’s more than 10–15 years old, it might just be worn out. You may want to consider a replacement.

Keep It Running Smoothly With These Quick Maintenance Tips

Change Filters: Every 1–3 months. Seriously, it makes a big difference.
Tune-Ups: Book a pro to tune up your system once or twice a year.
Clean the Outdoor Unit: Keep leaves, dirt, and debris away as much as possible. Gently hose off the condenser coils too.
Use Your Thermostat Wisely: A smart thermostat can optimize cooling schedules and save you money over time.

Still No Luck?

Sometimes, the best (or easiest) move is to bring in an expert. Don’t hesitate to diagnose and resolve lingering issues with a certified HVAC technician. We are here to help!

Why Your AC Needs a Surge Protector: Protect Your Comfort and Your Wallet

Written by Semper Fi on May 9, 2025. Posted in Air Conditioner Troubleshooting, Air Conditioning, Blog, HVAC, Maintenance.

When you hear “surge protector,” you probably think of that power strip under your desk with your laptop, phone charger, and TV plugged into it. But here’s something most homeowners don’t realize—your air conditioner needs protection too.

Power surges don’t give you a heads-up. They can hit suddenly and do some serious damage, especially to big-ticket items like your HVAC system. That’s why at Semper Fi Heating and Cooling, we’re big fans of playing it smart and staying protected.

An AC surge protector is like a bodyguard for your system. It helps shield your air conditioner from unexpected voltage spikes, keeping it safe, running smoothly, and saving you from surprise repair bills. In the next section, we’ll break down exactly what an AC surge protector does and why it’s one of the smartest upgrades you can make for your home.

What Is an AC Surge Protector, Exactly?

Think of a surge protector as a shield for your electrical equipment. Most people are used to the kind you plug your TV or computer into—but your HVAC system needs something with a little more muscle.

An AC surge protector is a more powerful version, installed right at your main electrical panel or outdoor AC unit. Its job? Spot voltage spikes—whether they come from lightning, power grid issues, or something inside your home—and safely redirect that extra electricity away from your HVAC system.

It’s a simple device that does a big job: protecting your air conditioner from damage and keeping your home comfortable and safe.

How Does an AC Surge Protector Work?

Inside every surge protector are components like metal oxide varistors (MOVs) and sometimes gas discharge arresters (GDAs). You don’t need to remember those names—but here’s what they do:

Absorb and safely redirect excess voltage before it hits your system
React in nanoseconds to keep delicate parts from frying
Protect critical components like your compressor, circuit board, and fan motors

In short: when a surge hits, the protector takes the blow—not your AC. It’s like armor for one of the most important systems in your home.

Why You Might Want an HVAC Surge Protector

Power surges aren’t just rare events caused by lightning—they can come from the power grid, large appliances cycling on and off, or even wiring issues. And those little spikes? Over time, they add up. Here’s why adding a surge protector to your HVAC system is a smart move:

Protect Your Investment: Your AC system isn’t cheap. One major surge can fry crucial parts like the compressor or control board—and that repair bill can get real pricey. A surge protector acts as a shield to help prevent that damage.
Avoid Costly Repairs: Think of a surge protector as insurance. It helps you dodge those unexpected repair costs that can pop up after a storm or random voltage spike.
Prevent System Downtime: When your AC is out, especially during an Arizona summer, it’s not just uncomfortable—it’s unbearable. A surge protector helps keep your system online and your home cool.
Extend the Life of Your AC: Every surge, big or small, puts stress on your system. Over time, that wear and tear shortens its life. Surge protection helps keep everything running smoothly, longer.
Keep Your Home Safer: Electrical surges can sometimes lead to sparks or fires. By protecting your HVAC system, you’re also helping to protect your home and your loved ones.

What to Look for in an AC Surge Protector

Not all surge protectors are created equal. If you’re shopping for one to protect your HVAC system, here are a few key features to keep in mind:

Joule Rating: This tells you how much energy the device can absorb before it fails. Aim for at least 600 to 1000+ joules for solid protection.
Clamping Voltage: This is the voltage level at which the surge protector kicks in. The lower, the better—look for something 400 volts or less to catch spikes early.
Response Time: Surges happen fast, so your protection should be faster. Choose a model that reacts in nanoseconds or less to stay ahead of any damage. Of course, you don’t have to figure this all out alone. A licensed technician (like our team at Semper Fi!) can recommend the right surge protector based on your system and your home’s electrical needs.

Professional Installation Matters

Surge protection for your HVAC system isn’t something you want to DIY. It means working with high-voltage components like your electrical panel or outdoor AC unit—and that’s a job best left to the pros.

At Semper Fi Heating & Cooling, our certified technicians are trained to install surge protectors safely and correctly. We’ll make sure your system is protected the right way, giving you peace of mind and long-term protection.

We’ve Got Your Back—The Semper Fi Way

As a proud veteran-owned company, we believe in doing things the right way—with honor, integrity, and expert service. When it comes to protecting your comfort, we don’t cut corners—and neither should you. Give us a call at 480-616-3636 or click here to schedule your surge protector installation or consultation. Don’t wait for a power surge to take down your AC. Get protected now and enjoy peace of mind all year long.

FAQs About AC Surge Protection

Q: Do I really need surge protection for my AC? A: Absolutely. Your HVAC system is full of sensitive electronics—like control boards and compressors—that don’t handle power spikes well. A surge protector is a simple, cost-effective way to protect one of your home’s biggest investments.

Q: Doesn’t my circuit breaker already protect my system? A: Not exactly. Circuit breakers guard against overloads and short circuits—not sudden voltage spikes. Surge protectors are specifically designed to stop those surges in their tracks.

Q: How long does an HVAC surge protector last? A: Most last anywhere from 2 to 5 years, depending on how often they take a hit. Regular inspections will help make sure you’re always protected.

Q: Can a surge protector prevent lightning damage? A: While nothing can fully protect against a direct lightning strike, a quality whole-home surge protector can dramatically reduce the risk and impact of nearby strikes or grid disturbances.

At Semper Fi Heating and Cooling, we’re here to help you stay protected, comfortable, and worry-free. Call 480-616-3636 today to ask about surge protector options for your home!

Woman DIY AC Repair - How to Fix Heating and Air Conditioning

How to Fix Heating & Air Conditioning Issues

Written by Chuck Kim on February 19, 2025. Posted in Air Conditioning, Blog, Furnaces, HVAC.

Your HVAC system is the foundation of keeping your home cool in the summer and toasty in the winter. A broken or malfunctioning system can leave you out in the cold, and you want answers fast. Some problems are easy to fix on your own, while more serious ones require professional help from an experienced HVAC technician.

If your AC or heater is not working, Semper Fi Heating & Cooling is here to help. We’ll go over common HVAC issues, how to fix your heating and air conditioning at home, and when it’s time to call in a professional HVAC company like us.

Common Reasons Your Heating or AC Is Not Working

Dealing with a malfunctioning HVAC system is frustrating, and the first step to solving it is determining the root problem. Once you know what’s going on, you can create a plan to fix it. Some of the most common causes for your HVAC not working properly include:

Power Issues

This may seem obvious, but your HVAC system needs power to run properly. The first step of troubleshooting your system is to check if it has adequate power. Something may have tripped the breaker in your home and cut power to the system, so look to check if this is the case. Also, take a look at your home’s fuse box and replace any blown fuses you find.

The other thing to check is the emergency shut-off switch. Make sure it’s in the “on” position and your HVAC system is getting adequate power.

Thermostat Issues

The thermostat is the brain of your heating and air conditioning, and it tells the system what to run and when to run it. Check that your thermostat is in the proper setting for what you need, whether that’s heating or cooling. You can also replace the batteries in the thermostat and make sure the wiring inside is secure and properly connected.

If your thermostat is in an area with a draft or direct sunlight, this can throw off the reading and cause your system to run inconsistently. Move it to an area away from direct sunlight near the center of your home to make sure the temperature reading is accurate.

Clogged or Dirty Air Filter

Your HVAC system requires proper airflow to keep it running smoothly and prevent it from overheating. It has air filters to catch dust and other debris before it travels throughout your home, and over time it can build up and cause a clog.

A dirty air filter reduces the efficiency of your system, but it’s an easy fix. Take a look at your filters and see if there’s a buildup of dust and other contaminants. If it looks full, you can purchase a new filter and install it yourself. Make sure you get the same size of filter and replace it every 1 to 3 months to keep your system running efficiently.

Low Refrigerant Levels

Your air conditioner uses refrigerant to cool the air before sending it through the vents across your home. If there isn’t enough refrigerant in the system, it can’t get the air as cold as it needs to be. Signs of low refrigerant levels to look out for include lukewarm air from the vents, a hissing sound, and ice buildup in your system.

Refrigerant recharges are a delicate process that requires professional help. It can be harmful if you come in direct contact with the material, and one wrong move could break your entire system. If you suspect the problem has to do with the refrigerant, call a professional HVAC company and let them handle it.

Frozen Evaporator Coil

Ice can build up on the evaporator coil in your air conditioner and prevent proper home cooling. If you notice a buildup of ice, turn off your AC and let it sit. Switch the fan to “on” to bring in some warm air, and gently use a hair dryer to melt the ice. Let the coils fully dry before you switch on the system again, and make sure your system has proper airflow and refrigerant levels.

Blocked or Dirty Condenser/Compressor Coils

Outdoor HVAC systems can get blocked up with dirt and foliage over time. You can keep your system running smoothly by clearing out any debris you see near your unit and making sure no dirt or leaves have snuck inside the unit.

Obstructed Airflow

Poor airflow reduces the efficiency of your system and prevents it from properly heating and cooling your home. Check that your vents and registers are clear of any debris or dust, and make sure the HVAC dampers are adjusted properly. Regular ductwork maintenance can also make sure everything looks good and your ducts are free of any dust or clogs.

Troubleshooting Guide: DIY Fixes Before Calling a Professional

Steps to Fix Your Air Conditioner

Check the Thermostat: Make sure your thermostat is set to the proper temperature and on the “cool” setting.
Inspect and Reset the Breaker or Fuse Box: Reset the breaker and check the fuse box to see if your AC is getting enough power.
Change or Clean the Air Filter: Take a look at the air filter in your unit and replace it if it looks full or clogged. Be sure to find the right size for your system.
Look for Ice on the AC Unit: Take a peak and see if you find any ice buildup inside your unit. Be sure to defrost it and melt the ice completely before turning the AC on again.
Clean the Outdoor Unit: If you have an outdoor unit, clear away any leaves, dirt, branches, or other debris that may be blocking air circulation.
Inspect Refrigerant Lines and Insulation: Check if there’s enough refrigerant in your unit and if it’s properly insulated.
Ensure Vents and Registers Are Open: Open the vents in your home and make sure the registers are clear of any blockages.

Steps to Fix Your Heater

Verify the Thermostat Settings: Make sure your thermostat is set to “heat” and the temperature setting is correct.
Check the Power Source and Reset the System: If both the breaker and fuse box in your home looks good, reset the heater to see if that starts it up.
Clean or Replace the Air Filter: Replace the air filter in your heater if it’s full of dust to improve airflow and unit efficiency.
Inspect the Heat Pump for Malfunctions: Check for any cracks or other visible problems that could lead to heater malfunctions.
Ensure the Gas Supply is On: If you have a gas furnace, make sure the gas supply is on and there’s adequate fuel getting to the unit.
Look for Pilot Light or Ignition Issues: The pilot light flame should be a vibrant blue; a red or yellow flame could indicate something is wrong. Make sure the ignition is working properly and your furnace is burning correctly.
Check for Frozen Outdoor Units: If you have an outdoor heat pump, see if parts are frozen and safely defrost them.

When To Reset Your HVAC System

Sometimes, a simple HVAC reset can kickstart your system into working like new. All you need to do is find the reset buttons on your unit and press them. Wait a few minutes before you start the system up again. If that doesn’t seem to work, you can try resetting the circuit breaker in your home to make sure your system is getting enough power. When resetting the unit or the breaker isn’t working, it may be time to contact a local HVAC professional.

Signs You Need Professional Help

You’ve tried all the troubleshooting tricks in the book, and none of them seem to work. Some issues are more complicated than a simple filter change, and in those moments you need professional HVAC help. You may need to call in the professionals if you notice:

Issues that persist after troubleshooting.
Loud noises or odors from your unit.
Signs of a refrigerant leak, such as hissing noises and ice formation.
Your system frequently turns on and off.
A sudden increase in your energy bills.

Preventative Maintenance Tips to Avoid Future Issues

No one wants to deal with a broken heater in the middle of winter, but you can help make sure that doesn’t happen. Regular HVAC upkeep can make sure your system is running smoothly and catch minor issues before they turn into serious breakdowns. To help prevent these issues from appearing in the first place, you can:

Replace your air filters every 1 to 3 months.
Schedule annual HVAC inspections and maintenance.
Keep your outdoor unit clear of any debris.
Check the calibration of your thermostat.
Schedule a professional air duct or vent cleaning.

Keep Your HVAC System Running Smoothly

Not all heating and cooling problems are created equal. Some simply require a filter change or system reset to keep your home cool in the summer. However, serious issues such as refrigerant leaks and loud banging from your system require a professional furnace and AC repairs to safely address the issue and get your home back up and running again.

If you’re looking for local HVAC professionals, Semper Fi Heating & Cooling is here to help. Our expert technicians know heating and cooling like the back of their hands, and we’re trained to handle any project that comes our way. We’re a veteran-owned and operated company ready to give back to our local community in the Phoenix Metro and Las Vegas areas.

Digital Thermostat Set To 78 Degrees - Best Temp for AC

The Best Temperature to Set Your AC at for Comfort & Savings

Written by Chuck Kim on February 19, 2025. Posted in Air Conditioning, Blog, HVAC.

When you come home from a long work day, you want your space to feel comfortable and cool to protect you from the summer heat. However, summers in the desert can get blazing hot, and your air conditioning must work overtime to maintain your desired room temperature. This can quickly skyrocket your monthly energy bill and reduce the longevity of your HVAC system.

The question homeowners in AZ and NV end up asking is, “How can I save money in the summer without sacrificing comfort?”

Your thermostat’s temperature settings may just be the answer.

At Semper Fi Heating & Cooling, we have years of experience working in the HVAC industry, and we know the ins and outs of air conditioning. We’ll go over some temperature recommendations for different times of day, other tips and tricks you can use to reduce your energy usage and debunk some common misconceptions about how to run your AC system.

What is the Best Temperature to Set Your AC?

You want your living space to feel comfortable without spending hundreds in utility costs. But is there an exact temperature that gives you the best of both worlds? There is!

The Department of Energy (DOE) recommends setting the thermostat to 78°F when you’re at home. Why this specific? They’ve found that this temperature is the perfect balance of personal comfort levels and improved energy efficiency. To put it simply, you save money while still being cool and comfortable on the couch.

While this is a great rule of thumb, there may be some personal adjustments you need to make so you remain comfortable in your home. Every home is different, and everyone’s comfort preferences are different, so you may need to adjust. However, keep in mind that setting a temperature cooler than 78 degrees will increase your monthly costs.

For example, people who live in an area with high humidity may want to run their system a little more to account for the stuffiness. If you’re an active person, you may want a cooler home when you come home sweating from a workout. For homes with more insulation, you may need to run your system less frequently to maintain a comfortable temperature.

Best AC Temperature for Sleeping

No one likes waking up sweaty in the middle of the night. Cooler temperatures when you sleep can improve the quality of your sleep and help you wake up feeling refreshed. The recommended thermostat setting for sleeping is anywhere between 60-67°F.

This is a stark contrast to the daytime temperature recommendation, with more than a 10-degree difference! Our bodies regulate our temperature differently while we sleep than while we’re awake. Many people run a little warmer when they sleep, and our internal temperature can vary depending on the sleep cycle stage. Keeping your bedroom a little cooler at night can help balance this extra heat, allowing you to fall asleep and stay asleep without waking up sweating.

If you’re worried about dropping the thermostat that low and overrunning your AC system, there are alternative things you can try to keep yourself cool. Utilize your ceiling fan to draw warm air up towards your ceiling and redistribute it around the room. You can also invest in a dehumidifier to reduce the moisture in your air and decrease that stuffy feeling. Lastly, invest in thin, breathable bedsheets that keep you comfortable without trapping your body heat.

Adjusting AC Temperature Based on Time of Day

Another great trick to help reduce the energy usage of your air conditioning during the summer is to make adjustments depending on the time of day and whether or not you’re home.

If you work in an office or travel enough to where you aren’t home during the day, you can increase the thermostat to around 85°F. It may be a little toasty, but you’re not there to feel it, and it reduces the amount of energy your HVAC system uses throughout the day. If you have pets who stay home all day, keep their safety and comfort in mind and adjust how much you increase the thermostat.

When you get home from work, you can reduce the temperature back down to around 78°F. When it’s time for bed, you can drop it further to keep your bedroom cool. You don’t want to immediately drop the thermostat from 85 to 65, as this will cause your AC to run continuously and burn a ton of energy to drastically drop your home’s temperature. Do it gradually throughout the evening to reduce the stress on your HVAC system.

It can be tough to remember to manually change your thermostat multiple times a day, and forgetting to adjust can cost you wasted energy. For peace of mind and improved efficiency, you can invest in a programmable or smart thermostat that makes the adjustments for you. You can program the thermostat to hold at a certain temperature at certain times of the day so you don’t have to worry about it.

How to Keep Your Home Cool Without Overworking the AC

When it gets especially hot outside, you want your home to be an oasis from the blazing sun. However, rising temperatures mean your air conditioning has to work harder to maintain the proper temperature in your home. This can strain the system and result in higher energy bills, but there are other things you can do. Here are some additional tips you can use to keep your home cool without running the air conditioning as much:

Utilize Air Circulation: Turn on your ceiling fan and invest in portable fans to keep air moving. Good air circulation prevents your home from getting stuffy and stale.
Use Window Treatments: The sun’s rays can heat your home even further. Close your blinds during peak sunlight hours to keep the heat out and your home cooler.
Seal Cracks & Improve Insulation: Sealing cracks and improving your home’s insulation keeps the heat out and traps the cold air in—that way your HVAC system doesn’t have to work as hard to maintain temperatures.
Be Aware of Heat-Generating Appliances: Reduce how often you use appliances that create heat such as the oven or dryer during peak hot hours in the middle of the day.

Energy-Saving Tips for Air Conditioning

Along with personal habits and thermostat adjustments, you can reduce your energy usage by taking care of your HVAC system. Ensuring your system isn’t working harder than it should saves you money and reduces the wear and tear on your system. Other energy-saving tips for your HVAC system include:

Set the thermostat fan to “Auto” instead of “On” to reduce how often the fans run.
Upgrade your home to a newer, more energy-efficient AC system with a good SEER rating.
Keep up with routine maintenance such as cleaning coils, replacing filters, and checking the refrigerant levels.
Create outdoor shade with landscaping and planting trees to reduce your home’s heat absorption.

Common AC Temperature Myths Debunked

There’s a lot of contradicting information on the internet about what the best temp to set the AC at is, and it can be tough to know what to believe. We’re here to debunk common AC myths so you can make an informed decision on what setting works best for your home:

Myth: Lowering the AC to 60°F Cools Your Home Faster

Some people argue that setting the thermostat to a lower temperature makes the system run faster and cools your home quicker. The reality is your HVAC system runs at the same rate no matter how low you set the thermostat; all it does is make your air conditioner run for longer and use more energy.

Myth: It’s Best to Turn Off the AC When You Leave the House

Another common argument is that since you’re not in the home, you should shut off your system entirely. However, this allows your home to skyrocket in temperature and get stuffy. When you get home, not only is your home going to be unbearably hot, but now your AC will have to work overtime to bring the temperature back down. It’s more energy-efficient to set the thermostat higher than it is to shut it off completely.

Myth: Fans Will Cool the Room

Box fans and standing fans don’t cool the air in your home. All they do is circulate the air and prevent it from getting stagnant and stuffy. The breeze cools us off, but it won’t change the overall temperature reading in your home.

Finding The Perfect Balance: Comfort, Efficiency, and Savings

Adjusting the thermostat throughout the day, investing in fans, and being aware of your energy usage can reduce your energy expenses without sacrificing your comfort. Finding the best temperature for air conditioning is a balancing act between personal comfort and energy savings. It can vary from person to person based on personal preference, so use trial and error to find what works best for your home.

Smart thermostats and regular AC maintenance can improve the energy efficiency of your home and save you money in the long run. If you need professional HVAC help, look no further than Semper Fi Heating & Cooling. Our team is ready to help keep your home cool in the summer without breaking the bank. Schedule an appointment today and see what we can do for you!

Heat and Air Conditioning, HVAC system service technician using measuring manifold gauge checking refrigerant and filling industrial air conditioner after duct cleaning maintenance outdoor compressor.

How Long Do Heaters Last?

Written by Chuck Kim on January 14, 2025. Posted in Blog, Furnaces, HVAC.

Not sure if it’s time to get a new heater (also known as a furnace)? Beyond purchasing well-made HVAC equipment, there are many factors that can shape the lifespan of a heater. Things like installation accuracy and frequency of heater maintenance can also impact how long your heating system provides reliable home comfort.

Let’s take a closer look at heater replacement and answer the question, “How long do heaters last?” We’ll start by reviewing the average heater duration and the factors that influence it. Next, we’ll list some of the key indicators that it’s time to replace your heating system, concluding with professional pointers for maximum heater longevity.

Let’s get started!

Average Heater Lifespan

Assuming it receives proper care and maintenance, a typical heater should provide dependable heating for 15 to 30 years. Regular upkeep—such as annual inspections, filter changes, and timely repairs—can significantly extend its operational life. While some rare units function beyond the 30-year mark, homeowners should realistically anticipate that their heater will perform within this general timeframe.

Many homeowners face the decision of whether to replace their heater before it fails. Some opt to proactively replace their unit once it is out of warranty, viewing this as a way to ensure continued efficiency and peace of mind. Others choose to invest in maintaining their existing heater, opting for service repairs until replacement becomes absolutely necessary.

Ultimately, the choice between preventive replacement and ongoing repairs often hinges on the heater’s condition, the cost of repairs, and individual comfort with the risk of unexpected failures.

Factors Affecting a Heater’s Lifespan

Your heating system should last you a couple of decades, but there are several key factors that will ultimately determine the lifespan of a heater:

Installation Quality: Proper installation is crucial for long-term performance. Poor ductwork design, improper sizing, or incorrectly sealed connections can restrict airflow and strain your system. When venting and fuel lines aren’t installed correctly, it can lead to inefficient operation and potentially reduce your heater’s lifespan by several years.

System Size: A heater that’s too large or too small for your home will cycle improperly, causing unnecessary wear on components. Oversized units short-cycle frequently, while undersized ones strain to meet heating demands. Either scenario can cut years off your system’s expected lifespan and drive up energy costs.

Maintenance Schedule: Annually scheduled furnace (heater) maintenance is vital for maximizing your heating system’s longevity. Regular cleaning, inspection, and tune-ups help identify minor issues before they become major problems. A well-maintained furnace can last 5-10 years longer than one that receives occasional care.

Usage Patterns: How you operate your heater significantly impacts its lifespan. Keeping thermostat settings between 60° and 80° Fahrenheit helps prevent system strain. Extreme temperature settings force your heater to work harder than necessary, potentially leading to premature component failure and shortened system life.

How Will I Know When to Replace My Heater?

Even well-maintained heaters eventually reach the end of their service life. When your heating system starts showing the following warning signs, it’s time to consider replacing it rather than investing in ongoing repairs. The silver lining? A new heater can provide improved comfort and energy savings compared to an aging unit.

Watch for these key indicators that it’s time to schedule a furnace (heater) replacement:

Rising Energy Bills: If your heating costs are climbing despite unchanged usage, your heater’s efficiency may be declining. Modern high-efficiency units can significantly reduce monthly energy expenses.

Frequent Repairs: When repair costs exceed 50% of the price for a new unit and service calls become frequent, replacing your heater is the more cost-effective choice.

Temperature Inconsistency: Uneven heating throughout your home or difficulty maintaining set temperatures often indicates your heater can no longer meet your heating demands effectively.

Unusual Noises: Rattles, bangs, or squeals may signal serious mechanical issues. While some noises warrant repair, multiple sound issues often indicate impending system failure.

Cold Air Output: A heater blowing cool air despite proper thermostat settings typically indicates major system problems that likely justify replacement.

How to Extend the Lifespan of Your Heater

Regular preventative heater maintenance is key to achieving the upper end of this lifespan. Trained HVAC professionals know how to identify potential issues before they lead to system failure, ensuring your heater stays dependable across multiple decades of service.

Here’s what you can do to protect your investment:

Professional Maintenance

Schedule annual professional maintenance with a qualified HVAC technician who knows how to thoroughly check, clean, and test components safely. Regular expert service helps catch minor issues before they become costly emergencies, ensuring your system operates at optimal efficiency.

DIY Maintenance

For routine maintenance between professional visits, check and replace your air filter monthly during peak heating season. Clean filters protect internal components from dust and debris while maintaining proper airflow.

Expert Heater Services in Phoenix, AZ & Las Vegas, NV

Now that you understand how long your heater should last and what you can do to maximize its lifespan, count on Semper Fi Heating & Cooling for all of your heater maintenance and repair needs. We’re committed to providing home comfort solutions that go beyond the scheduled job.

With over 1,300 5-star reviews and an A+ rating from the Better Business Bureau, Semper Fi is the company Phoenix counts on for dependable heating solutions.

Our heater services include:

Heater Installation
Heater Replacement
Heater Maintenance
Heater Repair

And remember this: when it’s time for replacement, modern heaters convert more fuel into usable heat than older models. While the upfront cost of a new high-efficiency heater may seem significant, the long-term energy savings and improved comfort make it a worthwhile investment when replacement becomes necessary.

At Semper Fi Heating & Cooling, we will help guide you through the decision-making process for cost-effective and dependable results. We know how to get the most out of your heating system while being mindful of heater replacement indicators. Schedule a heater inspection today to get started.

Hvac system exterrnal unit by a wooden fence in a house backyard

Heat Pumps vs Furnaces: Which is Right for You?

Written by Chuck Kim on January 14, 2025. Posted in Blog, HVAC.

While traditional furnaces burn a fuel source to produce heat, heat pumps don’t. Instead, they use electricity and various refrigerants to transfer heat from one location to another. Specifically, they take heat from the outside and pump it into your home, which is why they’re called heat pumps.

These systems work similarly to your refrigerator. Your fridge uses refrigerant to absorb heat produced by the appliance and pushes it out to keep your food cold. The difference is that with a heat pump, you want that heat. The pump then takes in external heat and pushes it into your home.

Benefits of Heat Pumps

Improved Energy Efficiency

Heat pumps are overall more energy efficient than traditional furnaces. They use less electricity to move heat than a furnace burns fuel to create heat. This can save you money in the long run.

2 in 1

While they’re called heat pumps, these systems do the work of both a furnace and an air conditioning unit. Not only do you not have to worry about maintaining 2 separate units, but this also means it requires less energy for a heat pump to heat and cool your home.

Lower Maintenance Costs

Routine maintenance services for a heat pump are generally cheaper than maintenance for a furnace or air conditioning unit. After the initial installation, the cost to keep your system running smoothly is more affordable.

Benefits of Furnaces

A furnace (also known as a heater) is the typical heating system people think of when talking about home HVAC systems. These systems use either electricity or burning fuel to create heat that is then distributed throughout your home. While heat pumps move heat that’s already present, furnaces produce heat on their own.

Gas Furnaces

Gas furnaces can get warmer than a standard electric furnace. Since they burn fuel to produce heat, they can create more heat and warm your home more efficiently. These systems can burn either propane or natural gas.

Electric Furnaces

Electric furnaces heat metal coils to warm the air in the chamber before distributing it throughout your home. Since there’s no fuel to burn and therefore no combustion, there’s no risk of a gas leak or other serious complications.

Comparing Heat Pumps and Furnaces

When looking for a home heating solution, it’s important to know the pros and cons of each to make an informed decision. We’ll compare the cost, installation, efficiency, maintenance, and energy usage for both heat pumps and conventional heaters so you get a good idea of how each works. With this information, you’ll be able to come to an informed decision about which option is the right one for your home.

Cost

One of the first questions many people will ask when comparing heat pumps to furnaces is which is the cheaper option. Unfortunately, this isn’t a straightforward question to answer. The cost of a heat pump or furnace depends on factors such as where you live, what your home is currently equipped with, and how big your home is.

If your home doesn’t have a gas line and you want a furnace, it’ll cost more to install the proper line. In addition, larger homes require larger units to properly heat the space. Larger units are going to be more expensive. However, both heat pumps and furnaces qualify for tax incentives.

Installation

The installation process for each can vary based on the structure you already have in your home. If you already have the ductwork from an air conditioning unit, it’s a quick swap to put in a heat pump. However, without the ductwork, installation will include tearing through drywall and putting the proper vents and ducts throughout your home.

Similarly, gas furnace installations require a fuel line. If you don’t already have a gas line, one will need to be installed through your home and under your property. In the end, the installation process and cost fluctuate depending on your situation.

Efficiency

When discussing the efficiency of heat pumps and furnaces, it depends on where you live. Since heat pumps don’t produce their own heat and instead transfer heat from outside, their efficiency depends on the climate. If you live in an area with milder winters such as Phoenix, a heat pump is a great option that can keep up with colder winter nights.

In comparison, people who live in areas with snowy winters that get below freezing may want to consider a furnace. Heat pumps can struggle to pump heat into your home when temperatures get colder, and a furnace will always be able to burn fuel and produce heat.

Maintenance

Both furnaces and heat pumps require routine maintenance to keep them running properly. As mentioned earlier, heat pump maintenance appointments can be cheaper than furnace maintenance appointments. However, this is balanced by the fact that heat pumps require more frequent maintenance services than furnaces. So, while each appointment may be slightly cheaper, they happen more frequently.

In the long run, furnace (heater) maintenance tends to be more affordable than heat pump maintenance.

Energy Usage

Since heat pumps only transfer heat instead of producing it, they use noticeably less energy than a furnace. Furnaces have to create heat, which takes more energy and can cause an increase in your utility bills.

However, also keep in mind that a heat pump’s energy usage depends on the climate. In freezing temperatures, your pump will need more energy to properly heat your home, in which case a furnace may be the more energy-efficient option.

Which is Right for You?

After looking at the differences between heaters vs furnaces, how do you know which is the right one for your home? The short answer is: it depends. Furnaces produce more heat than heat pumps, but they can cost more to repair and maintain. There are pros and cons to both, and it’s important to weigh your options and choose the one that works best for you and your situation.

Looking for professional furnace help? Semper Fi Heating & Cooling is your team of local HVAC experts in the Phoenix area. We’re proud to help keep our local communities warm in the winter with high-quality HVAC solutions that keep your system working like a charm. Get in touch with us today to schedule an appointment with one of our furnace specialists.

Woman putting cover on air conditioner unit outside the house

How to Winterize Your AC Unit

Written by Chuck Kim on January 13, 2025. Posted in HVAC, Maintenance.

As Phoenix and Las Vegas settle into their cooler months, many homeowners overlook a crucial task: winterizing their air conditioning units. While our desert winters are mild compared to other regions, leaving your AC system unprotected can lead to unexpected repairs and shortened equipment life. Even in our temperate climate, seasonal changes can expose your unit to damaging elements—from unexpected frost to corrosive dust storms.

At Semper Fi Heating & Cooling, we’ve seen firsthand how proper winter AC maintenance can extend your system’s lifespan and preserve efficiency. Taking simple precautions now can prevent costly repairs or downtime when summer returns.

In this guide, we’ll share our expert tips to winterize your AC unit so you can ensure it’s ready to perform when those triple-digit temperatures return.

Clean the AC Unit

Your air conditioner is vulnerable to the elements year-round, but cooler winter temperatures provide a convenient window for cleaning. To avoid electrical shock, start by turning off your AC (it’s getting less use anyway). Next, clear the unit by wiping away accumulated debris.

Look for and remove obstructions like:

Dirt
Dust
Leaves
Twigs and branches
Bug carcasses
Bird droppings

After the immediate vicinity has been cleaned and cleared, make sure to trim vegetation within a 2-foot perimeter of the AC unit. Doing so will allow for proper airflow once it’s time to power your AC unit back on.

Change the Air Filters

Your AC’s air filter is your home’s first line of defense against airborne contaminants that degrade performance and indoor air quality. As dust, pollen, and debris accumulate, your system is forced to work harder to maintain proper airflow. This additional strain not only elevates energy consumption but can also lead to mechanical wear and tear.

Winterize your AC unit by cleaning or replacing its air filters. The benefits of regular air filter replacement include:

Optimal system efficiency

A clean air filter provides better airflow, enabling your AC system to perform at peak capacity.

Reduced energy costs

When your AC operates efficiently, it consumes less power. By regularly replacing the air filter, you can potentially lower your utility bills and save money over time.

Reduced wear and tear

A clogged filter forces your cooling system to work overtime, which can lead to overheating and eventual failure. By changing the filters regularly, you help extend the lifespan of your HVAC equipment.

Improved indoor air quality

A clean air filter traps pollutants and allergens, providing you with healthier, breathable air. This is especially beneficial for individuals with allergies or respiratory issues, as it helps create a hygienic living environment.

Adjust the Thermostat

Cooler winter temperatures reduce our dependency on air conditioning. Use this to your advantage by adjusting your thermostat’s settings accordingly. When temperatures are nice outside during the winter, you can lower your air conditioner settings or turn off the system altogether. Adjusting your thermostat to reflect cooler outdoor temperatures not only reduces wear and tear but also reduces the amount of energy needed to cool your home.

Inspect the Ductwork

The air that’s cooled by your air conditioner is circulated through your home via a network of air ducts. As dust and debris accumulate in your ductwork over time, it can strain airflow, making it increasingly difficult to maintain HVAC efficiency.

Now is the perfect opportunity to have your ductwork professionally inspected for damage and cleared of the debris that’s built up during the cooling season. Consider scheduling an air duct cleaning appointment as part of your winter AC maintenance routine. During your appointment, air duct cleaning professionals will inspect for signs of air loss and make sure that areas with leaks are sealed for optimum performance.

Do a Test Run

Once you’ve taken the time to winterize your AC unit, make sure your due diligence has paid off with a test run. Start by turning your system back on and letting it run for 10-15 minutes. During this time, listen for abnormal sounds and observe your thermostat to make sure indoor air has reached the desired temperature.

If you notice anything out of the ordinary, call an HVAC professional immediately. They will send a trained technician over to double-check your work so that you can rest assured your AC runs smoothly when temperatures start to soar again.

Benefits of Proper HVAC Maintenance and Winterizations

Proper winter AC maintenance delivers substantial returns on your investment.

Some of the key benefits of HVAC maintenance include:

Lower Energy Bills: A well-maintained HVAC system operates at peak efficiency, consuming less power to maintain desired temperatures. Regular maintenance, including clean filters and properly sealed ducts, can reduce your energy consumption by up to 15%, leading to significant savings on monthly utility bills.

Extended System Lifespan: Just like any major appliance, your HVAC system needs regular care to perform at its full potential. With proper maintenance and winterization, your system can run reliably for 15 years or more, postponing the need for costly replacements.

Improved Air Quality: Regular maintenance helps your system filter out dust, allergens, and other airborne particles more effectively. Clean coils, fresh filters, and sanitized components ensure the air circulating through your home stays clean and healthy.

Prevention of Emergency Repairs: Routine AC and furnace maintenance helps identify and address potential issues before they escalate into major problems. This proactive approach not only saves you money but also prevents uncomfortable system failures during extreme temperatures.

Enhanced Home Comfort: A properly maintained HVAC system delivers consistent heating and cooling throughout your home. You’ll enjoy steady temperatures, reliable humidity control, and quieter operation year-round.

Schedule a Free HVAC Inspection in Phoenix, AZ or Las Vegas, NV Today!

Winterize your AC unit during the cooler months to maintain its performance and longevity when Phoenix and Las Vegas heat up again. Don’t wait until summer’s intense heat returns to discover AC issues. Contact Semper Fi Heating & Cooling today to schedule an HVAC inspection.

A businessman touches a digital progress bar indicating the transition from 2024 to 2025, symbolizing strategic planning, future readiness and challenge strategy for an HVAC Company

What to Expect in the HVAC Industry for 2025

Written by Chuck Kim on January 13, 2025. Posted in HVAC.

You shouldn’t even notice your HVAC system is on when it’s doing its job well. Especially with the integration of smart home services, heating and cooling your home has never been so hands-off.

Smart HVAC systems provide homeowners with automated climate control and remote operation for seamlessly tailored home comfort. Driven by convenience and affordability, HVAC technology will continue to get smarter, more efficient, and more environmentally friendly. To ensure their customers can take advantage of these emerging benefits, HVAC contractors must keep up to date with HVAC industry trends.

So, in the spirit of beginning a new year, let’s get excited about the future of the HVAC industry and the trends that will shape it. In the following article, we’ll take a look at what you can expect from 2025 HVAC systems and the professionals who repair and install them.

Smarter HVAC Systems

The same technology that helps us stay connected with others also helps your HVAC system communicate with the other smart systems installed on your property. By wirelessly integrating with other platforms, 2025 HVAC systems automatically update their settings in real time using local weather data obtained from your smart TV or occupancy routines gained from your doorbell camera.

The connectivity of home systems enhances overall automation, comfort, and energy efficiency.

Smart thermostats and HVAC systems connected with other smart home services are especially beneficial for:

Travelers, or people who have vacation homes.
Homeowners with pets.
Households with children who commute to and from school outside working hours.
Those with unconventional schedules.

HVAC Integration with Internet of Things (IoT)

Incorporating HVAC technology with IoT will continue to drive innovation in the HVAC industry—and rightly so. HVAC systems equipped with sensors, processors, and communicative software give homeowners supervision of their home’s climate based on real-time environmental changes. Thanks to remote and voice-activated control, smart HVAC systems integrated with IoT provide revolutionary energy management and comfort.

Predictive Maintenance

Any dependable HVAC repair technician will tell you that predictive maintenance is the key to preventing heating and cooling emergencies or unnecessary replacements. And thanks to artificial intelligence (AI), predictive maintenance has never been so easy.

AI-powered HVAC technology can interpret analytical data to monitor and anticipate HVAC issues. When abnormalities are detected, homeowners will receive fast alerts, giving them more time than ever to fix a problem before it escalates. The sooner HVAC issues are detected and addressed, the longer your equipment will perform.

Improved Climate Control

Smart HVAC systems offer unprecedented levels of customization through zone-specific temperature management. Rather than maintaining a single temperature throughout the home, these advanced systems enable room-by-room climate control, resulting in personalized comfort and significant energy savings.

The integration of AI-powered sensors in smart HVAC systems allows homeowners to continuously monitor and adjust their home’s climate. Beyond temperature, they will also be able to oversee:

Humidity levels
Air quality
Airflow patterns

These smart home services learn from occupant preferences and daily routines, automatically adjusting to optimize comfort and minimize energy consumption. For example, the system might reduce cooling in rarely used spaces while maintaining ideal conditions in frequently occupied rooms—all while considering factors like outdoor weather conditions and time of day.

Ductless HVAC Systems

Because energy efficiency remains a top priority in 2025, ductless HVAC systems are emerging as a leading solution for both residential and commercial applications. These systems, particularly mini-split units, are revolutionizing how we think about heating and cooling by eliminating the energy losses typically associated with traditional ductwork.

The versatility and sleek, wall-mounted design of ductless systems make them particularly attractive for modern homes and renovations. Whether you’re converting a garage into a home gym, adding climate control to a sunroom, or creating a comfortable home office environment, these systems offer targeted temperature control without the need for extensive structural modifications.

Quieter HVAC Systems

HVAC manufacturers understand the importance of peace and quiet and are implementing groundbreaking acoustic engineering solutions to reduce operational noise across all system components. These innovations include:

Advanced sound-dampening materials in ductwork.
Vibration-isolated compressors.
Specially designed fan blades that optimize airflow and minimize sound production.

What’s particularly impressive is how noise-reduction features can be integrated without compromising system performance. For example, new variable-speed motors operate at lower speeds during moderate weather conditions, resulting in whisper-quiet operation.

Additionally, smart sound-mapping technology allows systems to automatically adjust their operation patterns based on time of day and occupancy, ensuring minimal disruption during sleep hours or important meeting times.

More Eco-Friendly

Environmental consciousness is no longer just a trend—it’s a fundamental principle in HVAC design and operation. Manufacturers are responding to growing climate concerns by developing systems that consume less energy, and utilizing environmentally friendly refrigerants with lower global warming potential.

The integration of renewable energy sources with HVAC systems has set new heating and cooling standards. Hybrid systems that combine solar thermal technology with traditional temperature control methods are becoming increasingly common, allowing homeowners to significantly reduce their carbon footprint and enjoy substantial energy savings. Smart energy management systems further optimize performance, automatically switching between renewable and conventional power sources based on availability and demand.

The HVAC industry is also embracing circular economy principles, with manufacturers designing systems for easier maintenance, repair, and eventual recycling. This holistic approach to sustainability extends beyond energy efficiency to consider the impact of your HVAC system’s entire lifecycle—from production to disposal.

Upgrade Your HVAC System with Semper Fi Heating & Cooling Today

At Semper Fi Heating & Cooling, we hope you’re as excited about 2025 HVAC industry trends as we are. We take pride in being resources for the communities we serve, which means we’re committed to providing home comfort solutions that go beyond the scheduled job. Our services will leave you with peace of mind and knowledge that you can apply to daily home comfort.

If you live near Phoenix, AZ, or Mesa, AZ, and your home needs HVAC maintenance, Semper Fi Heating & Cooling will take care of you. Even though HVAC systems and smart home services are becoming increasingly easy to operate, just remember this: working around gas and electricity can be extremely dangerous. Semper Fi is a veteran-owned and -operated business, which means we bring military-grade precision to every service call. We make sure our work is performed efficiently and safely for complete home protection and comfort. Contact us today to get started!

Young woman sitting at home by the fireplace with a hot tea or coffee mug and warming her hands, she is wearing white woollen sweater. Cold houses in Europe concept during energy and gas crisis.

Winter HVAC Checklist

Written by Chuck Kim on December 12, 2024. Posted in Furnaces, HVAC, Maintenance.

As the Valley of the Sun transitions into its mild winter season, Phoenix homeowners have a golden opportunity to optimize their home’s comfort and energy efficiency. While our winters might not mirror the harsh cold of northern states, HVAC maintenance is equally crucial for keeping your home comfortable and your energy bills in check.

At Semper Fi Heating & Cooling, we understand that Arizona winters present unique challenges. Even though daytime temperatures hover pleasantly in the 60s and 70s, nights can dip surprisingly low and put unexpected stress on your heating system.

Our comprehensive winter HVAC checklist is designed to help local homeowners prepare their systems for these temperature fluctuations while maximizing home energy efficiency. In this guide, we’ll walk you through essential winter HVAC maintenance steps tailored specifically to Arizona’s climate.

You’ll learn how to:

Prepare your heating system for those occasional chilly nights.
Identify potential efficiency improvements.
Prevent unexpected breakdowns during winter’s cooler periods.
Reduce your energy consumption and lower utility costs.

How Cooler Weather Affects Your HVAC System

The transition from Phoenix’s intense summer heat to winter’s milder temperatures is more than a welcome relief for homeowners—it’s a critical moment for HVAC prep. As temperatures drop, your heating components face a unique set of challenges that can impact overall system performance and longevity.

During colder months, your HVAC system transitions from constant cooling to intermittent heating cycles, which creates distinct stress points. Components that have been dormant during summer must now spring into action, potentially exposing maintenance issues that went unnoticed for the last 6 months. Seals can become brittle, lubrication may have dried out, and minor wear can gradually progress into significant problems if not proactively addressed.

Phoenix’s winter temperature swings—where daytime temperatures might reach 70°F and nighttime temperatures can dip into the 40s—put additional strain on heating systems. These dramatic transitions require your HVAC to cycle on and off more frequently than it would during more stable seasons. This increased stress can accelerate component wear and potentially increase energy consumption, especially in situations where your system is already operating below peak efficiency.

Dust and debris accumulated during the dry summer months can also compromise your HVAC system’s performance. As you transition from cooling to heating mode, these particles obstruct airflow, reduce heating efficiency, and potentially trigger allergies or other respiratory issues. Comprehensive winter HVAC maintenance ensures these potential challenges are identified and resolved before they require complex and costly repairs.

5 Tips for Preparing Your HVAC System This Winter

Winter HVAC prep isn’t complete without the following steps. Consider this your furnace maintenance guide as you prepare your home for the changing seasons and the challenges that come with it.

Clean or Replace Your Air Filter

The air filter is your home’s first line of defense against airborne contaminants that weaken heating and cooling performance. As dust, pollen, and debris accumulate, your system must work harder to maintain proper airflow, which can lead to increased energy consumption and mechanical strain. Regular filter cleaning and maintenance—typically every two to three months—ensures:

Optimal system efficiency
Reduced energy costs
The prevention of unnecessary wear on your heating equipment
Improved indoor air quality

Cover Your HVAC Unit

Phoenix’s winters may be mild compared to other regions of the country, but protecting your outdoor condenser unit is critical for long-term HVAC health and performance. Clear a five-foot perimeter around the unit and cover it with a breathable, protective sheet or tarp to prevent debris accumulation, avoid potential water damage, and minimize exposure to harsh environmental elements. This simple yet effective protective measure can extend your HVAC system’s lifespan by reducing exposure to corrosion and damage during the cooler months.

Calibrate Your Thermostat

Winter in the Phoenix metro area requires a precise balance between comfort and energy efficiency, making thermostat calibration a critical step in furnace maintenance. Modern smart thermostats offer programmable settings that automatically adjust temperatures based on your daily schedule, potentially reducing annual energy consumption by up to 10-15%. By fine-tuning your thermostat’s settings or upgrading to a smart thermostat, you’ll ensure consistent home comfort, prevent unnecessary system strain, and reduce overall heating costs.

Check Drain Lines & Clean Coils

Your HVAC system’s condensate drain lines and heat exchange coils are vulnerable to debris buildup. When this happens, it can significantly impair performance and potentially lead to costly repairs. Accumulated dust, dirt, and microbial growth obstruct drainage, reduce heat transfer efficiency, and create health hazards through compromised indoor air quality. Professionally cleaning these components ensures optimal system performance, prevents water damage, and maintains the hygienic operation of your heating system.

Test Your Furnace Ahead of the Cold Weather

Proactively testing your furnace before the winter season can help identify potential issues before they unexpectedly cause problems during seasonally cold nights. A comprehensive test run allows technicians to detect mechanical inefficiencies, clean accumulated dust from air ducts, and ultimately ensure your system is prepared for consistent heating performance. This approach provides peace of mind by preventing unexpected breakdowns and expensive emergency repairs during the year’s most critical heating periods.

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A Prepared Furnace is the Key to a Cozy Winter

At Semper Fi Heating & Cooling, we take pride in being resources for the communities we serve. We’re committed to providing home comfort solutions that go beyond the scheduled job. While we hope you found this guide educational, at the end of the day, furnace maintenance is a job for trained HVAC professionals. Working around gas and electricity can be extremely dangerous—but our specialized 29-point furnace tune-up provides proactive furnace care for complete safety and comfort during the winter.

We also recognize that winter HVAC maintenance is more than a routine checklist—it’s about keeping your home a personal sanctuary during Arizona’s cooler months when we often spend more time inside. As a veteran-owned and -operated business, our team of expert technicians brings military-grade precision to every service call, diagnosing and repairing potential issues before they get the chance to compromise your home’s heating system.

By choosing Semper Fi Heating & Cooling, you’re not just getting a maintenance service; you’re investing in peace of mind and long-term HVAC reliability that will keep your home comfortable through every winter night.

Did you find this Winter HVAC Checklist helpful? Let us know by sharing your comments or questions below!

Experienced HVAC Technician Maintaining Commercial Air Conditioner to Ensure Safety and Compliance with Regulations

DIY Or Call a Pro? Common HVAC Repairs You Shouldn’t Do Alone

Written by Chuck Kim on November 14, 2024. Posted in Air Conditioning Repair, Blog, HVAC, Maintenance.

Sometimes, your air conditioning breaks in the middle of the summer, and you don’t want to wait around until someone comes to fix it. You could probably do it yourself—how hard could it be?

Stop that train of thought right there. While, yes, there are minor HVAC repairs you could safely do on your own, this doesn’t mean you should crack into your system and start fiddling around.

Certain components of your HVAC system are dangerous to meddle with unless you have the proper training and equipment. You put your safety at risk if you’re not careful.

If you want to know which repairs you can do at home and which should have you calling a professional, you’ve come to the right place. This guide will go over HVAC repairs you should leave to the professionals as well as some DIY HVAC repairs you can safely do at home. This way, you make an educated decision that keeps you and your family safe.

HVAC Repairs to Leave to the Professionals

First and foremost, let’s go over which repairs should be left to the experts. These repairs are tricky to fix, and you could make the problem worse if you try to sort it out yourself. In addition, these repairs could lead to serious safety concerns if not addressed properly.

Replacing Refrigerant

Refrigerant is what allows your AC to blow cool air throughout your home in the summer. It cools down the air so your home is comfortable. However, freon and other refrigerants such as R-32 are heavily regulated by the Environmental Protection Agency (EPA). These refrigerants can only be handled by a licensed HVAC technician, as they are considered hazardous materials.

If you need to replace the refrigerant in your HVAC system, it’s best to leave it to the professionals.

Thermostat Calibration

Calibrating your thermostat involves connecting it to your HVAC system and making sure it’s giving a proper temperature reading. Installing a thermostat improperly can throw off your entire HVAC system and cost you money in the long run.

This is especially true for smart thermostats. The electrical wiring and installation process should be handled by a trained HVAC technician to make sure the thermostat is compatible with your system and working properly.

Electrical Repairs

Any electrical work on your home can be dangerous, especially if it involves your HVAC system. Your heating and cooling require a high voltage of electricity to run properly, and you put yourself at risk if you mess with it yourself. You could experience serious injuries from electrocution and even fatal consequences.

Keep yourself and your family safe. If you’re having electrical problems with your HVAC system, let the professionals take care of it.

Replacing Parts

If a component in your HVAC system breaks, it may need to be replaced. Replacing any part of your heating and cooling system is a tricky balance of safely removing the old part and properly installing the new one. If the new part is installed incorrectly, it can lead to serious breaks and safety concerns later on. HVAC replacements should be left to the experts.

Duct Cleaning

Dust and other debris can build up in your HVAC ducts and make your system less efficient. While it seems straightforward to clean them out, it requires specific tools to effectively clean without damaging your ducts. Duct cleaning should be left to the experts who have the training and certification to do the job safely.

HVAC Repairs You Can Do Yourself

Don’t fret too much—not all HVAC work requires an appointment with a professional. There are a handful of repairs you can safely do on your own to keep your system running smoothly. Two common AC repairs you can do at home include tidying up around your unit and changing the air filters.

Tidying Up Around Your HVAC Unit

Whether you have an indoor or outdoor unit, your HVAC system needs proper airflow around it to do its job properly. You can clean up around your unit to make sure it’s free of any debris and has good airflow. Make sure there’s no clutter around your indoor unit, and if you have an outdoor one, be sure to clean up any leaves or debris that might pile up around it.

Changing Air Filters

Your HVAC system has a series of air filters to help prevent the buildup of dust and other debris in your ducts. You can help your system run smoother for longer by replacing these filters. It’s an easy repair task, and you should do it every 30 to 60 days.

Rely on The Pros at Semper Fi For Your HVAC Maintenance Needs

Doing certain AC repairs at home can save you money and hassle, but certain repairs are not worth risking your safety. If you feel hesitant about doing something yourself, don’t hesitate to reach out to an HVAC professional. It’s better safe than sorry, even for minor repairs.

Are you looking for a professional HVAC company in the Phoenix or Las Vegas areas? Semper Fi Heating & Cooling offers same-day service and straightforward pricing for all of our HVAC maintenance and repair needs.