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

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:

  1. 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.
  2. 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!
  3. 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.
  4. 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.
  5. 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.
  6. 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.
  7. 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:

  1. Thermostat Malfunction: If it’s misreading the temp or is outdated, it might not know when to shut off.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.
  2. 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.
  3. 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.
  4. 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:

  1. 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.
  2. Leaky Ducts: Cooled air might be escaping through holes in the ductwork. If so, get them checked and have them sealed
  3. Closed Vents or Blockages: Walk around and make sure none of your vents are closed or blocked.
  4. 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

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:

  1. 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.
  2. 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.
  3. 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.
  4. 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.
  5. 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!

Furnace Not Blowing Hot Air? Here’s Why

With winter just around the corner, keeping your home warm and cozy is a top priority as the temperatures drop. That’s what your furnace is for—just turn it on, and it should heat your home. At least, that’s the idea. But what if you turn on your furnace and discover it’s blowing cold air instead? That won’t do much to keep your family warm, and you’ll want answers fast to get things back on track.

Is your furnace or heater not blowing hot air? You’re in the right place. Here, we’ll walk you through 7 potential reasons your furnace might not be working properly—and when it’s time to call in the professionals.

Incorrect Thermostat Settings

If you notice your furnace is blowing cold air, the first thing you should do is check your thermostat. While this seems obvious, your furnace can blow cold air if the thermostat setting is wrong. You’ll want to check the fan setting as well. If your fan is set to “on,” then it will blow air continuously throughout your home, making the air feel cold. Try switching the fan setting to “auto” and see if that helps.

If this doesn’t fix the issue, check the temperature setting on your thermostat. It should be set to a temperature that’s higher than the current reading in your home. If it’s lower, make the necessary adjustments to reset the temperature.

After changing the fan and temperature settings, the last thing you can check is your thermostat’s batteries. Low or dead batteries can lead to improper temperature control, so change the batteries and see if that fixes the problem. 

Dirty Filter

Do you remember the last time you changed the air filters on your furnace? If the most recent filter change was months or years ago, this may be the issue as to why your furnace isn’t blowing hot air. 

HVAC air filters catch particles such as dust and allergens before they circulate throughout your home, making your air cleaner. Over time, these filters can get so full of dust and debris that airflow is limited in and around your furnace.

Luckily, this is an easy fix. Take out the filters in your furnace and hold them up to a light. You should be able to see some light passing through the filter. If you can’t see any light, this means the filter is full, and it’s time to replace it. Look at the size of the filter and make sure you replace it with the same size to ensure proper airflow.

You should change your air filter every 6 months. If you have pets or more traffic in your home, you may need to do it more frequently. Check your filters once a month to see if you need to replace them. 

Pilot Light Issues

Gas furnaces use a pilot light to ignite the heater and warm the air. This light is meant to stay on at all times, but sometimes it can get blown out by accident. If you recently had maintenance done on your furnace, the pilot light may have been snuffed out. The first thing to do is check your furnace ignitor and see if the pilot light is on. If it’s off, you may be able to relight it yourself. Check your furnace’s manual to see how to safely relight it. 

If you relight the pilot light and it goes out again shortly after, it could be dirty. A buildup of dust and other debris can prevent your pilot light from staying lit. You can clean off any debris you see and try relighting it again.

If the light goes out again after cleaning it, the last thing to check is the gas supply line. Make sure the line is open and your furnace is getting a consistent supply of gas. 

Ducts are Leaking

The ducts in your home are what carry the warm air from your furnace to the vents throughout your home. Over time, these ducts can get worn down from daily use. This can lead to cracks or damage that cause outside air to mix with the warm air from your furnace. Cold air can seep in, and your warm air can leak out, leading to the air from your vents feeling cold.

Damage and weak spots in your ductwork can go unnoticed until you turn on your furnace and feel cold air. You can have an HVAC professional inspect your ducts and check for any damage or weak spots that can be letting in cold air.

Low Fuel Supply

Whether you have a gas, electric, or oil furnace, they all run off a fuel source to keep them running properly. Without fuel, your furnace may start to blow cold air without producing any heat. 

  • Gas Furnace: A gas furnace can’t produce heat if it doesn’t have gas to burn. Check that your gas valve is open and your furnace is getting the gas it needs.
  • Electric Furnace: An electric furnace won’t run without power. If your furnace is not running at all, check for a blown fuse or breaker.
  • Oil Furnace: Oil furnaces need to burn oil to produce heat. Check to see if the oil tank is empty and if your furnace has enough fuel to run.

Old or Dirty Flame Sensors

Your furnace has a built-in flame sensor that turns it on and off depending on if there’s a flame present. This prevents gas from traveling through your vents and into your home. Over time, this sensor can become faulty and give false signals to the furnace. A buildup of dirt and grime can also cause the sensor to malfunction, leading to your furnace turning on and off repeatedly.

If the flame sensor shuts off your furnace, the fan may keep chugging along. This filters cold air throughout your home rather than the warm air you want. 

Furnace Is Overheating

If your furnace is not blowing warm air, it could be that it’s overheating. Your furnace could be overheating for a variety of reasons, such as needing to replace your filters. As your furnace gets older, parts can begin to wear down and become less efficient. 

If you suspect your furnace is overheating and you’ve tried the previous options with no success, contact an HVAC expert to take a look. The issue could be serious enough that you don’t want to risk trying to fix it yourself. Leave it to the professionals who know what they’re doing.

When Should You Call a Professional?

furnace in attic

Your furnace and HVAC system consist of a ton of different parts that all work together to keep your home warm. When your furnace isn’t doing its job, there could be one of many causes. You can do basic at-home fixes such as replacing filters, adjusting the thermostat, and checking your furnace’s fuel source. Any other repairs need to be left to the professionals.

Semper Fi Heating & Cooling offers furnace repair services to get your home warm in time for winter. Our team will work with you to get to the root of the issue and get your furnace back up and running in no time. We also offer maintenance services to help prevent these issues from happening in the first place. We’re proud to serve our local communities in the Phoenix and Las Vegas areas.

Summer AC Maintenance Tips & Tricks

TL;DR: With summer approaching, it’s crucial to ensure your AC system is well-maintained to beat the heat efficiently. Regular maintenance enhances efficiency, reduces energy costs, and prevents major breakdowns, improving air quality and extending your AC’s lifespan. Look out for signs like reduced performance, strange noises, or increased energy consumption. Proactive maintenance includes tasks like cleaning filters, coils, and condensate drains, as well as scheduling professional inspections. 

 

With summer on the horizon, temperatures are going to start to reach that point where we all turn to our ACs for comfort. Given the heavy use of your air conditioning (AC) system in the summer heat, you need to make sure that it’s in optimal operating condition. 

Proactive AC care is the key to beating the heat and avoiding potential breakdowns during the hottest months of the year. By taking the time to give your AC system the attention it needs, you not only guarantee your comfort but also reduce energy costs. 

Are you ready to beat the heat with our proactive maintenance strategies

Today, we’ll walk you through the benefits of proactive AC maintenance and how to recognize the signs that your AC needs attention. So, let’s dive right in!

What You Gain From Proactive AC Maintenance

There are many benefits to performing regular maintenance on your AC system. It enhances the efficiency of your unit, enabling it to effectively cool off your home. Having your AC operate with increased efficiency translates into lower energy bills which means bigger financial savings. 

By keeping your AC system in peak condition, you can also prevent major breakdowns that would require costly repairs or even a premature replacement of the unit. Proactive AC care improves the air quality in your home as long as you keep your filters, coils, and ducts clean. 

Also, by removing dust, allergens, and other air pollutants, your air conditioning system creates a healthy living environment for every household member. And lastly, regular maintenance will help your AC system last longer, extending its lifespan by years and minimizing your environmental impact.

Signs That Your AC Needs Maintenance

It’s vital to know and be able to recognize the signs that suggest your AC system requires maintenance. Let’s go over the most common ones:

Reduced Performance.

If you notice that the cooling performance of your AC is diminishing, it’s a telltale sign that it needs attention. The usual reasons your AC might be having difficulties cooling your household include dirty filters, clogged coils, or a malfunctioning thermostat.

Unusual Noises or Odors 

If you notice strange noises or foul odors emanating from your AC, this is a major red flag. Grinding, rattling, or squealing sounds often mean that there’s a mechanical issue that you need to address. Foul odors could indicate the presence of mold or mildew growth on the inside, ending up affecting your indoor air quality and potentially causing health risks.

Increased Energy Consumption

Another sign of AC trouble to watch out for is an increase in energy consumption. If your energy bills have been steadily rising without any changes in usage, it may indicate that your AC is struggling and is in need of regular maintenance.

Proactive AC Maintenance Strategies for Beating the Heat

To beat the heat this summer and keep your AC system running smoothly, it’s essential to implement proactive maintenance strategies. Here are some key strategies to consider:

  • Clean and Replace Filters. Clean or replace your AC filters every month to improve airflow and the overall quality of the indoor air. A clogged filter affects the cooling and can put a significant strain on your system, leading to potential breakdowns.
  • Check and Clean Coils. Regularly inspecting and cleaning your AC coils is vital to removing mechanical obstacles that hinder heat transfer, such as dust or debris. Clean coils enhance cooling efficiency and reduce energy consumption.
  • Lubricate AC Fan Motors and Belts. Properly lubricate AC fan motors and belts to reduce the associated friction and protect the system from excessive wear. This maintenance task can significantly increase how long your AC lasts and how it performs.
  • Test and Adjusting Thermostat Settings. Remember to constantly check and calibrate your thermostat so that you receive precise and accurate temperature readings, which help you set up optimal cooling performance. Energy savings are one of the great benefits of a properly set thermostat, but so is a comfortable indoor environment.
  • Checking and Cleaning AC Condensate Drain. The AC condensate drains tend to get blocked over time, so draining helps prevent clogs and water leakage. A blocked drain can lead to water damage and mold growth, compromising both your AC system and indoor air quality.
  • Clearing Debris Around the Outdoor Unit. Make sure to regularly clear up branches, leaves, and other debris that might gather on the outdoor unit. This allows for proper airflow and helps prevent potential issues and subsequent damage to the unit.
  • Scheduling Regular AC Maintenance Appointments. Last but not least, make sure you schedule regular maintenance appointments with a professional AC maintenance service. They’ll perform comprehensive inspections, identify potential issues, and carry out necessary repairs or adjustments.

Hiring a Professional AC Technician for Maintenance

Whether your AC is in a state requiring maintenance, you should turn to professional services for comprehensive AC care. Qualified AC technicians have the necessary expertise and detailed knowledge to asses your system and pinpoint potential issues that you might not be able to notice yourself.

Professional AC maintenance services also have the necessary tools and equipment to identify issues, reach inaccessible areas of your AC, and perform any necessary repairs. Experts can perform tasks such as inspecting electrical connections, checking refrigerant levels, testing thermostat accuracy, and cleaning condensate drains.

By hiring a professional AC technician for regular maintenance, you can rest easy while they address any issues immediately, prolonging the life of your AC system and tuning it up for the hard work it is facing in the summer heat.

DIY AC Maintenance Tips

Most AC maintenance and repair tasks should be left to the professionals. However, there are several things you can do on your own to help improve the AC system’s performance.  

One of the easiest things you can do on your own is to regularly clean your filters, or maybe replace them. Dirty filters restrict airflow, reducing the efficiency of your system. A good rule of thumb is to clean them monthly and replace them at least once during the what season to ensure proper airflow and cleaner indoor air.

Cleaning your AC system’s coils is another vital maintenance tip you can do by yourself. With regular use, these coils accumulate debris and dirt particles that can get in the way of heat transfer and reduce the cooling capacity of your AC. You only need a soft brush to clean the coils gently, or alternatively, you can use a vacuum cleaner. 

Additionally, lubricating AC fan motors and belts can reduce the risk of your AC breaking down by way of preventing wear and tear. Ensure you use the appropriate lubricant recommended by your AC manufacturer to avoid any damage.

Conclusion

In conclusion, proactive AC care is essential for beating the summer heat and creating a comfortable, cool environment in your home. By understanding the importance of regular maintenance, recognizing signs that your AC system needs attention, implementing easy DIY tips, and seeking professional assistance, you can ensure optimal performance and prolong the lifespan of your AC unit. 

With proactive AC care, you can stay cool, save on energy costs, and enjoy the summer months to the fullest. So, if you’d like to be prepared to beat the heat this summer, Sempre Fi Heating & Cooling has proactive maintenance strategies to cater to your needs. 

 

Contact us to schedule a tune-up and enjoy a cool and carefree summer! 

 

The ROI of HVAC Maintenance: How It Adds Value to Your Property

TL;DR: Installing a new HVAC system can cost between $5,000 to $12,000, but it’s a valuable investment for homeowners. Regular maintenance, costing $75 to $200, offers significant returns in energy efficiency and property value. Energy-efficient systems with modern features like smart thermostats attract buyers and fetch higher prices. Compliance with regulations and green certifications adds to desirability. Keeping professional maintenance records and following practical tips maximize HVAC value. Regular check-ups, filter replacements, cleaning, and choosing upgrades tailored to your needs ensure optimal performance and longevity. Overall, investing in HVAC maintenance is crucial for preserving property value and ensuring comfort.

 

Installing a new HVAC system can be a significant investment and cost homeowners anywhere from $5,000 to $12,000, depending on the system’s size and complexity. Unsurprisingly, most new home buyers see great value in properties equipped with a functioning HVAC system.

However, the condition of the HVAC system is closely tied to your property’s overall value. When the HVAC system runs perfectly, it saves energy costs and makes the property more attractive to potential buyers who recognize its value. So, let’s closely examine the ROI of HVAC maintenance, how it adds value to your property, and how to keep your system in perfect shape.

Calculating the ROI of HVAC Maintenance

If you are trying to understand the return on investment (ROI) of HVAC maintenance, start by considering your initial maintenance expenses. These include regular check-ups, part replacements, and repairs to avoid other issues. That will cost you around $75 to $200. That price tag might seem like a lot at first, but you must weigh it against the savings on buffer repairs.

Savings come in several forms, notably through energy efficiency. When your system is well-maintained, it can run on less energy, meaning lower utility bills. Similarly, regular maintenance includes replacing all worn-out parts and extending the unit’s life. 

If you have an HVAC system running without issues, that can help you increase the value of your property if you ever decide to sell. Properties that have systems with environmental certifications can fetch a higher price. This increase in market appeal contributes positively to your ROI, making the investment in maintenance even more worthwhile.

Increased Property Value Through Energy Efficiency

Real estate buyers are more aware of the long-term benefits and savings of having energy-efficient features in your home. As a result, properties with modern HVAC systems often attract the attention of energy-conscious buyers. A recent study found homes with energy-efficient features sell more often and at a higher price point. 

Modern HVAC systems operate more efficiently, using less energy to heat and cool the home, translating into significant savings over time. For your HVAC to be energy efficient, it must have at least a SEER 14 rating. Modern systems use the latest technology to maintain optimal temperatures and use minimal electricity compared to outdated HVAC units. That can reduce your property’s carbon footprint, which will likely appeal to potential buyers.

Improving Indoor Air Quality

Recently, Mesa, Arizona, has had issues with air quality, so you must ensure the air you breathe indoors is better quality. You can upgrade the HVAC system with high-efficiency air filters or add air purifiers to reduce the presence of pollutants and allergens. 

These pollutants are not just outdoor intruders like pollen and dust. They include indoor particles such as pet dander, household chemicals, and mold spores. Not having them in the air can help you be more healthy. 

Having your HVAC not contribute to low air quality can make your property more appealing and increase its value. Prospective buyers or tenants often look for homes that promise a healthy living space, and if their new home already has an air-purifying system, that is one less expense they have to worry about.

The Appeal of Smart HVAC Technology

Prospective homebuyers are looking for homes that are not only move-in ready but also equipped with modern conveniences that make life easier. Smart thermostats and HVAC systems offer them total control over the home’s temperature directly from their smartphone or voice-activated devices. They can even teach the system their preferences, and it can automatically adjust the settings for maximum comfort. 

Beyond comfort, these systems are also more energy-efficient, translating into potential savings on utility bills. They usually come with detailed usage reports, helping homeowners understand their energy consumption and identify further opportunities for savings.

Regulatory Compliance and HVAC Systems

You might already be aware that various regulations and standards dictate how HVAC systems should operate within homes. These rules cover everything from installation and maintenance to efficiency and emissions. Ensuring your HVAC system complies with these standards prevents potential fines and makes your home more attractive to future buyers. It’s a straightforward equation: compliance equals desirability.

Green certifications, such as Energy Star or LEED, are benchmarks of efficiency and sustainability for HVAC systems. Such certifications prove that your HVAC system effectively heats or cools your home with less energy, significantly reducing your home’s overall carbon emissions. That is a main selling point in today’s market, where energy efficiency and environmental responsibility are increasingly important to buyers.

Professional Maintenance Records as Proof of Care

When you sell your home, potential buyers want assurance they’re making a wise investment. Keep your maintenance records as proof that you’ve cared for the HVAC system, following regulatory standards and best practices for system upkeep. These records can show potential buyers that the HVAC system is in excellent condition and won’t need expensive repairs or replacements shortly after purchase.

Practical Tips for Maximizing HVAC Value

Your HVAC system can add the most sales value to your property if you inspect and maintain it regularly. Maintaining your HVAC system won’t be burdensome if you stick to a servicing schedule. Some of the things you can regularly do are:

  • Replace HVAC system filters every three months, but possibly more often if you have pets or live in a dusty area.
  • Keep the area around your outdoor units clear of debris and foliage. That allows your system to breathe easier, improving efficiency and prolonging its life.
  • The indoor unit can collect dust and other particles that affect air quality and system performance. Ensure the coils and blower components are clean, which will help your system operate more effectively.
  • Dust and debris can accumulate in your ducts over time, blocking airflow and forcing your system to work harder, which, in turn, can lead to increased energy costs and reduced system lifespan. Duct cleaning is something you should entrust to a professional, but still do often.
  • Regular professional check-ups by HVAC specialists at least once a year can help catch any potential issues before they become big problems, saving you money in the long run.

Tips on Choosing HVAC Upgrades

Energy-efficient HVAC models can be a more significant initial investment but often pay for themselves through lower utility bills. Smart thermostats are another excellent upgrade, allowing homeowners to control the heating and cooling remotely and set more efficient schedules. When selecting these upgrades, consider your home’s size, climate, and specific needs to ensure you’re making the most cost-effective decision.

Invest In HVAC Maintenance in Mesa, Arizona

Regular HVAC maintenance is a sound investment in your property’s value and your wallet. An efficient system will reduce energy costs, make your unit more long-lasting, and ensure high-level air quality. That highlights the undeniable impact that proper care and maintenance have on the value of your property.

There are more benefits than drawbacks to regular HVAC maintenance. Once you decide to ensure proper care for your HVAC system, hire the HVAC experts Semper Fi Heating & Cooling in Mesa, Arizona. Our regular maintenance service can keep your system in perfect condition for years.

We can help you with all your heating, cooling, or air quality needs. Don’t let your investment go down the drain – call us today and get your HVAC back in shape!

 

FAQ

How often should I schedule HVAC maintenance?

It’s recommended to schedule HVAC maintenance at least once a year to ensure optimal performance and efficiency. Semper Fi Heating & Cooling in Mesa, Arizona, offers professional maintenance services tailored to your system’s needs. Regular check-ups by our HVAC specialists can help detect and address any issues before they escalate, saving you money in the long run.

What are the benefits of upgrading to a smart thermostat?

Upgrading to a smart thermostat offers several benefits, including increased convenience, energy savings, and improved control over your HVAC system. Semper Fi Heating & Cooling provides expert guidance on choosing and installing smart thermostats that integrate seamlessly with your heating and cooling setup. With our help, you can enjoy enhanced comfort and efficiency in your home.

How can I improve indoor air quality in my home?

Improving indoor air quality is essential for a healthy living environment. Semper Fi Heating & Cooling offers solutions such as high-efficiency air filters and air purifiers to reduce pollutants and allergens in your home. Our HVAC experts can assess your indoor air quality needs and recommend the right products to ensure clean and fresh air throughout your property.

What sets Semper Fi Heating & Cooling apart from other HVAC companies?

Semper Fi Heating & Cooling stands out for our commitment to excellence, reliability, and customer satisfaction. With years of experience serving the Mesa, Arizona, area, we have built a reputation for delivering top-notch HVAC services at competitive prices. Our team of skilled technicians is dedicated to keeping your HVAC system running smoothly and efficiently, ensuring your comfort and peace of mind year-round.

What Are The Main Parts of an AC Unit?

Air conditioning units are essential for maintaining a comfortable environment in your home, especially in warm climates like Phoenix. Understanding the various components of an AC unit can help you better maintain and troubleshoot your system. Here’s a breakdown of the key parts and their functions.

What Are Air Conditioning Units?

Air conditioning units are complex systems designed to cool your home by removing heat and humidity from the indoor air. They come in various types and sizes, but all work on the same basic principles of refrigeration and air circulation.

The Main Parts of an AC Unit

  1. Compressor: The heart of the AC unit, the compressor circulates the refrigerant necessary for heat exchange.
  2. Condenser Coil: Located in the outdoor unit, it releases heat removed from the indoor air.
  3. Evaporator Coil: Situated in the indoor unit, it absorbs heat from your home’s air.
  4. Expansion Valve: It regulates the flow of refrigerant into the evaporator coil.
  5. Air Handler and Blower Unit: These circulate and distribute the conditioned air throughout your home.
  6. Thermostat: This is the control system that sets your desired temperature.
  7. Air Filters: They trap dust, pollen, and other particles to keep the air quality high.
  8. Refrigerant Lines: These pipes carry the refrigerant between the indoor and outdoor units.

How Do AC Units Work Together

The AC unit’s process begins when the thermostat signals the compressor to start. The compressor pumps refrigerant to the evaporator coil, where it absorbs heat from the indoor air. The now heated refrigerant is then transferred to the condenser coil, where it releases heat to the outside air, cooling the refrigerant down again. This cycle continues until the indoor air reaches the desired temperature.

Common AC Unit Problems and Troubleshooting

Common issues include refrigerant leaks, clogged air filters, malfunctioning thermostats, and compressor or fan failures. Regular maintenance, like cleaning filters and checking for leaks, can prevent many of these problems. If troubleshooting doesn’t resolve the issue, it’s advisable to contact a professional.

Frequently Asked Questions

How does an air conditioner work?

An air conditioner works by removing heat and humidity from indoor air through a cycle of refrigerant compression, condensation, and evaporation, controlled by a thermostat.

What are the main components of an AC unit?

Key components include the compressor, condenser coil, evaporator coil, expansion valve, air handler, blower unit, thermostat, air filters, and refrigerant lines.

What is the purpose of the evaporator coil?

The evaporator coil absorbs heat from the indoor air, contributing to the cooling effect.

What is the role of the condenser coil in an AC unit?

The condenser coil releases the absorbed heat from the indoor air to the outside, helping to cool down the refrigerant for the next cycle.


Understanding the components of your AC unit is crucial for efficient operation and maintenance. For professional advice and services for your AC unit in Phoenix, turn to Semper Fi Heating and Cooling. We are here to ensure your home remains cool and comfortable. Learn more about AC units and how to keep them running smoothly on our blog.

Can you repair an AC compressor?

Understanding the main components of AC compressor failure, understanding the signs of a faulty AC compressor, knowing the importance of professional repairs of your homes AC compressor, and being aware of common AC compressor problems are necessary steps in keeping your AC unit in good condition and ensuring it functions at its peak.

Understanding The Main Components of AC Compressor Failure

AC compressors are one of the most important components of an air conditioning system. Without them, the system is unable to cool the air or remove humidity from it. However, like any other mechanical device, an AC compressor can fail. Understanding the main components of AC compressor failure can help diagnose and repair problems.

The first component of AC compressor failure is a malfunction in the compressor’s motor. The compressor’s motor uses electrical energy from the air conditioning system to power a piston, which compresses the system’s refrigerant. If this motor malfunctions, the compressor will not be able to compress the refrigerant and cooling will be impaired. Other common causes of motor malfunction include faulty wiring and burnt out bearings.

Another component of AC compressor failure is a problem in the compressor’s impeller. The impeller is a wheel-like part that helps assist in moving the refrigerant throughout the system by forcing it into a rotary motion. If this part becomes clogged or breaks, the circulation of the refrigerant will be impaired and the compressor will not be able to do its job properly.

The final component of AC compressor failure is a leakage in the system. This leakage can cause a decrease in pressure in the system, leading to a decrease in the amount of cooling available. Leaking hoses or valves are common causes of this type of AC compressor failure. This type of failure can also be caused by a faulty liquid receiver or a broken seal in the system.

In order to properly diagnose and repair an AC compressor system, it is essential to understand the three main components of AC compressor failure. Once the source of the malfunction is known, the necessary repairs can be made and cooling restored to the system.

Signs of a Faulty AC Compressor

AC compressors are important components of air conditioning systems, as they help to move the cold air into different rooms in the home. A faulty AC compressor can create problems for the entire air conditioning system and can seriously affect the performance of the unit. It is important to be aware of the signs of a faulty AC compressor, so that any issues can be quickly identified and resolved.

One common sign of a faulty AC compressor is loud noises coming from the unit. This could be the sound of grinding, clicking or squealing coming from the unit itself. If the compressor is struggling to handle its load it can cause these sounds to occur, which can indicate problems with the compressor itself, or potentially other elements of the air conditioning system.

Leaking or dripping fluid from the AC compressor is also a significant sign of an issue. This fluid can come from internal components or condenser lines that have become worn or deteriorated. If this occurs, it is important to turn the AC unit off immediately and have it inspected as a matter of urgency.

If the cold air from the AC is not coming into the room properly, this can be an indication of a problem with the compressor too. If the air conditioning system is not running as efficiently as it should be or is not cooling the room sufficiently, this could point to the compressor having to work too hard, potentially indicating a problem.

Finally, issues in airflow can also be a sign of a faulty AC compressor. If there is a reduction in the airflow coming from the AC unit then this can be a sign that the unit is struggling, potentially due to the compressor not being able to do its job properly.

It is important to remain vigilant for any of these issues and act quickly to attend to them. If the signs persist then it is advisable to contact an experienced specialist to inspect and diagnose the issue, so that it can be repaired or replaced if necessary.

The Importance of Professional Repairs of Your Homes AC Compressor

A functioning air conditioner compressor is an important part of any home’s cooling system, as it controls the air flow throughout the rooms and helps maintain a comfortable temperature. A broken AC compressor can cause a variety of problems. Aside from sporadic warm air, a faulty AC compressor can cause a rise in energy bills and create additional mechanical damage due to an increase in the fan’s cycling and the air handler becoming overworked. Professional repairs are important to ensure that all parts, including the AC compressor, are effectively maintained and repaired.

Hiring a trained professional to repair your air conditioning system can save time as well as money. Professionals have years of experience working with such systems and can be counted on to properly diagnose the issue and perform the required repairs quickly and correctly, often with little disruption to your home lifestyle. Furthermore, their work is usually backed by a guarantee, ensuring that you are getting the best service for your money.

If the AC compressor is not working correctly, it is important to get it fixed as soon as possible to avoid additional damage to the system. Deciding to leave the issue unresolved can not only lead to inconvenience but also to potentially catastrophic problems, including irreparable damage to the compressor and thus your cooling system.

Signs that the AC compressor is not functioning properly can include a lack of air coming from vents, excessive noise coming from the unit, and a yellow pilot light which will notify when the compressor is not engaging properly. It’s important to be vigilant and to address any of these signs as soon as possible in order to prevent further damage to your unit.

An air conditioner compressor repair can be a difficult task for an untrained individual to undertake, as specialized knowledge and tools are required. Professional technicians at Semper Fi use a number of repair techniques, including refrigerant recharging, air ducts cleaning, oil changing, and filter changing. Having a professional taking care of the repair process will ensure that the unit is operated efficiently and safely, while also maintaining the integrity of the system.

Repairing an air conditioning compressor can be costly, but it’s worth the expense when you consider the cost of an entirely new system. Because of this, it’s important to address problems as soon as possible to prevent bigger issues from arising which may require more costly repairs in the future. Professional repairs can provide peace of mind by extending the life of the AC system and providing safer operation of the same.

Common AC Compressor Problems

A broken air conditioner compressor can cause a multitude of potential problems and, if it is not repaired or replaced quickly, can lead to a complete AC system shutdown. The compressor is the most expensive component of the entire air conditioning system as well as being essential to its function; this means that it is imperative to identify and address any AC compressor problem as soon as possible. Common AC compressor issues can include overheating, failure to start or stop running, loud noises, and tripping of circuit breakers.

Overheating is one of the most common AC compressor problems, and can be caused by a number of issues, including low refrigerant, a thermostat malfunction, or debris build-up in the condenser coil. To check for overheating, look for signs of reduced airflow, increased pressure, or a decrease in cooling capacity. If diagnosed with an overheating issue, contact a certified HVAC technician for proper maintenance and repair.

Another common AC compressor problem is that the unit might fail to start or might start, but not stop running. This can either be caused by faulty wiring connections or a failing start capicator, a device which ensures that the AC compressor starts up properly each time. In addition, most AC compressor units produce a loud noise when running. If the unit is exhibiting louder than normal noise levels, there may be an issue with the bearings, which should be examined and serviced by a certified technician.

Finally, the AC compressor may possibly trip a circuit breaker if it has been installed improperly, or if the unit is trying to run on too few amps. If the unit is not properly drawing the right amount of power, it can cause the breaker to trip. To fix this issue, either install the AC compressor to a dedicated line and breaker, or else upgrade the breaker to a higher amperage. It is important to have an electrician assess the power situation before attempting to run the AC compressor on a different power line or circuit.

Regardless of the AC compressor problem that is encountered, identifying it early is the key to resolving any issues quickly and efficiently. Having a certified air conditioner technician assess the system can ensure that any related problems are diagnosed, serviced, and repaired with the utmost care.

Final Thoughts

Due to the complexity of AC compressors, it is crucial to be aware of all the components of AC compressor failure, the signs of a faulty AC compressor, and the importance of professional repairs. By doing so, homeowners can identify common AC compressor problems to be able to repair it or replace it as needed. Since AC compressor failure can lead to major problems in AC performance, it’s important for homeowners to hire experienced, certified technicians when dealing with a faulty AC compressor or other problems with your AC.

Frequently Asked Questions

What is an AC compressor and what is its role in the cooling system?

An AC compressor is part of an air conditioning system. It is responsible for pressurizing the system and circulating the refrigerant throughout the system. The compressor compresses the refrigerant vapor thereby raising its temperature as well as its pressure. This hot, high-pressure vapor then flows into the condenser, where it is cooled and condensed back into a liquid. The cooled liquid then flows back into the compressor, and the cycle repeats. The compressor is essential to the cooling system, as it is what keeps the process in motion.

How do I know if my AC compressor is malfunctioning?

You may be able to tell if your AC compressor is malfunctioning if you experience any of the following problems:

– Poor cooling performance
– Strange noises coming from the compressor
– A burning smell coming from the compressor
– Increase in energy bills
– Leaky refrigerant lines
– Unusual vibrations from the compressor
– Unusual condensation build up
– The compressor continuously switching on and off

Can I repair my AC compressor myself or should I hire a professional?

It is generally recommended to hire a professional when repairing an AC compressor as the system can be complicated and also potentially dangerous if not handled correctly. A professional HVAC technician will have the necessary training and experience to make the repairs correctly and safely.

What are the benefits of professional AC compressor repair?

The benefits of professional AC compressor repair include improved system performance, more reliable operation, and increased energy efficiency. By repairing any malfunctioning components, such as the compressor, you can help your system run more consistently and efficiently. Additionally, professional repair can extend the life of your system and help keep your energy bills down, as a properly functioning system can be more energy efficient.

How much does it typically cost to repair an AC compressor?

The cost to repair an AC compressor depends on several factors, including the type of compressor, the severity of the issue, and the cost of parts and labor. Generally, it can range anywhere from $200 to $1,500.

Heating & Cooling Terms You Should Know – Part 2

More heating and air conditioning phrases, words and acronyms that you may need to know.

  1. A Heat Exchanger is the part of a heating system that transfers heat to the air that circulates throughout a home. The heat exchanger is the largest component of a furnace. Over time, a heat exchanger can develop cracks, causing incomplete fuel combustion and dangerous carbon monoxide to be released into the air that is circulating in a home.
  2. HVAC is short for Heating, Ventilation, and Air Conditioning. It refers to a furnace, air conditioner, and some method of circulating warm and cool air throughout a house. H-VAC is the generally accepted name for the entire industry.
  3. Minimum Efficiency Reporting Value (MERV) is a rating for air filters. Air filters have tiny holes that allow air to pass through while trapping small particles in the air. The higher the MERV rating, the smaller the holes and more efficient filters.
  4. Micron is a unit of measurement. One micron is one-millionth of a meter, or 1/25,000th of an inch. Tiny particles of mold, viruses, dust and dander circulate with your home’s air. An air filter can trap these tiny one-micron particles. If allowed to circulate, the particles can have harmful effects on your health.
  5. NATE Certification (NATE) North American Technician Excellence is an industry training and testing organization that certifies that service technicians have passed rigorous testing and are certified experts in the HVAC industry. Homeowners can be comfortable knowing that NATE-certified technicians are installing and servicing the heating and cooling equipment in their homes.
  6. Particles are substances that measure less than 100 microns in diameter. Some large particles like dust and dander are visible to the naked eye. Others like bacteria and viruses can only be seen with a microscope. All particles can become airborne and sometimes cause serious health problems.
  7. Refrigerants are chemical compounds that produce a cooling effect while expanding. R22 refrigerant, also known as Freon, is still found in many home air conditioners but has been banned from new systems. R410-A refrigerant is the most common replacement for R22. It does not contain the ozone-depleting qualities of R22.
  8. A Ton is a unit of measurement of cooling capacity. One ton of air conditioning can remove 12,000 BTUs of heat in one hour. Home air conditioners or heat pumps typically come in the 2-ton to 5-ton range.
  9. A Smart Thermostat will observe the time you wake up, go to work, return home, and go to bed. Then it adjusts its settings to match your daily routine. It will even observe that your house is empty for multiple days and adjust accordingly. If your smart thermostat is online, you can tell it to warm or cool your home just before you arrive.
  10. Zoned HVAC is a heating and cooling system that can direct air to specific areas of a home. With a zoned system, it is possible to use dampers in the ductwork to customize temperature zones throughout the home.

What Size Furnace Do You Need?

Hint: Bigger Isn’t Better

Time will come when your old furnace is not worth attempting to repair. You can live with rattles, squeaks and uneven heating in your home. You could even live with small repair bills. But no heat on a cold night is over the limit. It will be time to look for a new furnace. Then, don’t think about moving up to a larger-capacity furnace unless you know your old furnace is undersized. An oversized furnace usually creates more problems than it solves.

It’s Less Efficient

A properly sized furnace is an optimally sized furnace – not too big and not too small. Every time a furnace starts up for a heating cycle, it takes a few minutes to warm up. During the warmup, it is operating at less than peak efficiency. After it is warmed up, it operates at peak heating efficiency. An oversized furnace may warm up the house too quickly and shut down before or shortly after the warmup. Repeat that over and over all day and all night and the furnace is always operating less efficiently than it should.

Life Expectancy

Over years of service, the on again/off again cycles will cause excess wear to system controls and ultimately shorten the lifespan of the large furnace. An optimally sized furnace is more efficient and will have a longer operational life. A well-maintained, high-quality, properly sized furnace should provide efficient heating for 15-20 years or more.

Short Cycling

A common problem with oversized furnaces is called short cycling. It happens when sensors in the furnace cause it to overheat and shut down before the house has warmed up. The oversized furnace produces more heat than the system needs. The most positive identifier of short cycling is when the thermostat’s two temperatures—room temperature and thermostat set temperature—never match. Short cycling is a safety hazard. If sensors fail to shut the furnace down, the furnace is a real fire hazard. The end result of short cycling is that the house is not comfortable, fire risks increase, and the life of the furnace is reduced.

Distribution of Heat Will Be Uneven

It isn’t unusual for one area of a house to be cooler or warmer than others. Replacing a properly sized furnace with an oversized furnace will not solve the uneven heat problem; it will make it a bigger problem. The comfortably warm areas in the house will become overly warm and the cool rooms may not get any warmer.

Part of the procedure of installing a new furnace is to check the size of the existing furnace to make sure it is properly sized. The professional, licensed technicians at Semper Fi Heating & Cooling are experts in getting the right furnace for your home. They will spend the time necessary to recommend a high-quality replacement furnace. A truly optimized furnace will provide energy efficiency, long life, comfortable living space, and home safety. Give them a call today at 480-616-3636.

The Language of HVAC – 10 Terms You Should Know

Most people think they know the meaning of many of these furnace and air conditioning terms. It’s actually a little more complicated than that.

  1. What do the letters HVAC stand for? Heating, Ventilation, and Air Conditioning. In other words, furnace, air conditioner and some method of circulating warm and cool air throughout a house. H-VAC is the generally accepted name for the entire industry.
  2. A furnace creates heat. It does that by burning natural gas, bottle gas, heating oil, or electrical heating coils. Not all furnaces create heat with the same amount of energy usage. Nearly all new furnaces are more energy efficient than their not-so-distant replacements, but a well-maintained furnace in a well-insulated home can operate efficiently for many years.
  3. An air conditioner produces cool air, but, like a furnace, some do it more efficiently than others. Typically, the years of operational life are fewer for an air conditioner; a fifteen-year air conditioner is usually approaching the time when repair costs begin to mount, and replacement seems like a good option.
  4. An air handler is the part of the ventilation system that draws in warm or cool air for the furnace or air conditioner to turn it into cool or warm air, respectively, then blows it out into ducts that deliver it throughout a home. While operating, an air handler continuously circulates home air. Along with ductwork and a blower, an air handler is the V in an HVAC heating and cooling system.
  5. There are two sets of ducts in a conventional central air heating and cooling system. Air flows through intake ducts to your furnace and air conditioner and is discharged into a second duct system that delivers it to the rooms of a home. The same air circulates over and over, getting heated or cooled along the way.
  6. Smart thermostats truly are smart, and they get smarter over time. A smart thermostat will observe the time you wake up, go to work, return home, and go to bed. Then it adjusts its settings to match your daily routine. It will even observe that your house is empty for multiple days and adjust accordingly. With a connected smart thermostat, you can even send it a message that you are on the way home and it will have your house comfortable when you arrive.
  7. Ductless, or ductless mini-splits, as the name implies, do not have ducts to circulate air. Small units are located in one or several rooms. They can provide heat or cooling or both. They are excellent for keeping a newly added room or garage comfortable or even an entire house.
  8. Heat pumps are energy-efficient heating and cooling systems. A heat pump does its job by moving heat. In the summer, it removes heat from a house and discharges it outside. In winter, it draws heat from outside and circulates it inside. Contrary to common logic, there is plenty of heat outside on even the coldest days.
  9. Internal Air Quality (IAQ) is a measure of the pollutants in the air circulating in a home. The main line of defense against dirty air is the air filter in the home heating system. Heating and cooling professionals have a variety of other options to clean harmful gases and particles from indoor air.
  10. SEER is short for Seasonal Energy Efficiency Ratio, sometimes called Seasonal Energy Efficiency Rating. SEER ratings are given to heating and cooling systems to help consumers evaluate energy efficiency. Ratings range from 13 to 25. As of January 1, 2023, SEER 13 is the lowest approved efficiency rating by government mandate.

In the world of heating and cooling professionals, there is a sizable lexicon of words and phrases to know. The pros at Semper Fi Heating & Cooling can guide you through the repair and/or replacement process for HVAC machinery. Give them a call today at 480-616-3636.