HVAC systems keep Greenville homes comfortable through the hottest summers and coldest winter nights. When they run efficiently, homeowners save money, avoid stress, and enjoy healthier indoor air.

Following the right HVAC maintenance tips not only improves comfort but also prevents major repairs down the line. A clean and well-maintained energy-efficient HVAC unit uses less energy, creates consistent airflow, and delivers better temperature control.

For families across the upstate area and from North Main to the Eastside, routine upkeep has a direct impact on comfort, safety, and monthly bills. Greenville’s weather brings long stretches of humidity followed by chilly cold snaps.

Without consistent maintenance, systems are more likely to break down when they’re needed most. Investing time and care into HVAC maintenance leads to fewer emergencies, lower repair costs, and better indoor living year-round.

Change Your HVAC Air Filters Regularly

Changing filters is one of the most practical home HVAC tips any homeowner can follow. Air filters trap dust, pollen, and pet dander before they circulate throughout the house. When filters clog, the system works harder, airflow slows down, and indoor air quality suffers. Dirty filters also shorten the lifespan of critical components, which can lead to expensive repairs.

How often should you change your HVAC filters?

To improve performance and indoor air quality, filters should be changed every one to three months. Homes with pets or frequent visitors may need new filters on the shorter end of that range. Sticking to this routine helps prevent breakdowns, improves air quality, and saves money in the long run. Skipping replacements often leads to AC repair calls that could have been avoided.

Check and Calibrate Your Thermostat

A thermostat that isn’t set correctly can add unnecessary strain to the entire system. Regularly checking settings and calibrating when needed helps maintain steady comfort.

For even better results, Greenville homeowners should consider upgrading to smart thermostats. These devices automatically adjust temperatures based on your family’s schedule and the weather outside, helping lower energy costs without sacrificing comfort.

Local temperature swings highlight why thermostat accuracy matters. On crisp mornings, heat may be needed. But by afternoon, air conditioning could be necessary. A smart thermostat responds to these shifts automatically, saving time and money while keeping living spaces comfortable.

Keep Outdoor Units Clean

Outdoor HVAC units are exposed to the elements year-round. Leaves, dirt, grass clippings, and overgrown plants can quickly block airflow. When airflow is restricted, systems lose efficiency and work harder than necessary. Simple steps like trimming shrubs, clearing debris, and gently rinsing off coils with a hose make a noticeable difference.

Residents along Augusta Road and in the West End may notice more debris from trees and seasonal storms. Checking the outdoor unit at least once a month helps prevent buildup and allows the system to run at its best. Clean surroundings keep energy bills lower and reduce the chance of breakdowns.

Seal Ductwork and Improve Insulation

Energy loss often happens through ducts and insulation rather than the unit itself. Leaky ducts allow cooled or heated air to escape, making the system work harder. Proper air duct cleaning improves airflow, while air duct sealing keeps treated air inside where it belongs. Together, these steps reduce wasted energy and keep rooms consistently comfortable.

Homes in Greenville’s older neighborhoods, such as Augusta Road or downtown, often benefit most from duct inspections. Insulation upgrades also play a role, preventing outside temperatures from creeping in. With Corley Pro’s air duct cleaning and repair services, systems last longer, homeowners save money, and indoor comfort improves dramatically.

Schedule Professional HVAC Tune-Ups

Residential HVAC maintenance goes beyond filter changes, covering system checks that keep Greenville homes comfortable and energy bills stable. Homeowners can handle filter changes and debris removal, but professional servicing of HVAC systems is critical for long-term performance.

Investing in professional maintenance helps prevent breakdowns during peak heating and cooling seasons. A professional tune-up from Corley Pro improves efficiency, reduces breakdown risks, and adds years to your system’s life. This includes checking refrigerant levels, inspecting electrical connections, cleaning coils, and testing airflow. These steps prevent unexpected breakdowns and improve reliability.

In Greenville, scheduling tune-ups at least once a year is strongly recommended. For heavy-use homes, twice-annual inspections—before summer and winter—can prevent seasonal failures. A professional eye often catches issues before they become costly repairs, saving time and reducing stress for homeowners across the Upstate.

Consider Doing Regular HVAC Maintenance with Corley Pro

Professional care goes beyond one-time visits. Corley Pro offers ongoing maintenance plans designed for Greenville families who want peace of mind. These plans include priority scheduling, discounts on repairs, and comprehensive checks to keep systems in top shape. Signing up for regular AC maintenance through a trusted local company helps you avoid surprise breakdowns.

For prompt AC repair or scheduled service, Greenville homeowners can rely on responsive, professional support from Corley Pro. Our team is trained to handle everything from routine inspections to emergency AC repair.

Whether your system needs a quick tune-up or major servicing, you can expect responsive and reliable support from Corley Pro. Homeowners in neighborhoods from The Eastside to North Main benefit from having a trusted local partner with experienced professionals who understand the unique needs of Greenville homes.

Tired of weak airflow, strange smells, or sky-high utility bills? A dirty air conditioner could be to blame. While you may be wondering how to clean your air conditioner, a professional cleaning appointment ensures your system runs efficiently and safely.

Let’s explore how HVAC professionals clean your air conditioner and the signs that it’s time to schedule service.

Steps a Professional Follows When Cleaning a Central Air Conditioner

Hiring a professional for air conditioner cleaning means getting a thorough, methodical process that goes far beyond just swapping filters. Certified technicians understand how to clean the inside of an air conditioner by following a series of steps that address all aspects of the unit. This process helps extend the system's life while improving indoor air quality.

Below is a step-by-step look at what happens during a typical central air conditioning cleaning service.

Turn Off Unit

The first step in any professional AC cleaning service is completely powering down the system. Technicians will shut off the thermostat and disconnect power at the breaker box or service switch near the outdoor condenser. This ensures safety and prevents damage to electrical components during the cleaning process.

Disassemble the Vent Cover

With the unit safely off, the technician removes the vent cover from the indoor unit or air handler. These covers can collect the dust, pet hair, and debris that contribute to airflow problems and reduced air quality. Professionals clean these parts thoroughly using a brush or vacuum and inspect for signs of damage or mold.

Remove and Clean the Air Filter

Next, a professional will remove the system’s air filter—usually located inside the return vent or the air handler. Dirty or clogged filters restrict airflow, strain the system, and hinder indoor air quality. Depending on the filter type, the technician may vacuum and rinse it or recommend a replacement.

Many technicians also advise setting a regular air filter replacement schedule based on the filter’s MERV rating and your household’s air quality needs.

Clear the Drain Line

The condensate drain line can become clogged with algae, mold, or debris, especially in humid environments. A blocked drain line can lead to water leaks and even mold growth. Technicians will flush the line using a vacuum or special cleaning solution to ensure that moisture drains properly away from the system.

This step is essential for preventing water damage and maintaining optimal AC performance.

Deactivate Outdoor Unit

For central air conditioning systems, cleaning the outdoor condenser unit is just as important as servicing the indoor components. A technician will first turn off the power to the condenser at the disconnect box. This prevents any risk of electrical shock while working on the unit.

Cutting power also protects the system’s fan motor and compressor during cleaning.

Remove the Top of the Condenser Unit

Once the unit is de-energized, the technician removes the top grille or fan assembly from the condenser. This provides full access to the interior, including the fan blades, condenser coils, and base of the unit.

The fan and surrounding housing often collect leaves, dirt, pollen, and even small animal debris over time. Cleaning this out restores airflow and improves efficiency.

Spray the System

With the fan removed, the next step a technician will follow when cleaning an air conditioner is sanitizing the interior of the condenser using a coil cleaner and gentle water spray. The aluminum fins and copper tubing inside the condenser are delicate and require careful handling.

A professional avoids high-pressure sprays that could damage the fins. Instead, they use soft-bristle brushes or a fine comb if the metal has become bent or clogged.

Inside, the evaporator coil may also be treated with a no-rinse coil cleaner, especially if mold or mildew buildup is present.

Give Time to Dry

After the system is cleaned, all components must dry completely before the unit is reassembled and powered back on. Trapped moisture inside a reassembled AC unit could lead to short circuits or mold growth.

Professionals may use compressed air or allow the system to air-dry, depending on environmental conditions and the level of moisture involved.

Top Signs Your Air Conditioner Needs to Be Cleaned

Regular cleaning is the key to keeping your air conditioner running smoothly. We’ve covered pressing questions like how to clean the inside of an air conditioner with professional assistance—but how do you know when it’s time to schedule a professional service?

Here are the most common signs your AC system is overdue for a deep clean.

Lack of Cool Air

If your AC is running but the air coming out of the vents feels lukewarm or weak, clogged filters or dirty coils could be the problem. Reduced cooling power often signals that airflow is being restricted somewhere in the system.

A professional air conditioner cleaning can restore full airflow, helping your system cool your home faster and more efficiently.

Strange Operational Noises and Smells

Rattling, buzzing, or musty smells from your vents could indicate debris buildup inside the system. Mold growth in the condensate line or evaporator coil is another common culprit.

If your AC smells “off” or makes noise during operation, a technician can clean the source and prevent further damage.

Dirt and High Energy Bills

Have your utility bills spiked unexpectedly this season? A dirty air conditioner may be to blame. When coils, filters, and drain lines are clogged, your system has to work harder and use more energy to cool your home.

Even a thin layer of dirt on the evaporator coil can reduce efficiency by up to 30%. Regular cleanings help reduce energy waste and lower your monthly cooling costs.

You might also notice visible dust around vents or on the return grille. These signs mean your AC system isn’t filtering air properly and could be circulating dirt back into your home.

Professional Air Conditioning Tune-Up and Cleaning Services

When it comes to home comfort, few things are as important as a properly maintained air conditioner—especially during the hot summer. If your HVAC system is malfunctioning, our team members are available to help you. Our technicians offer trustworthy air conditioning repair services in Greenville, South Carolina and the surrounding areas.

At Corley, our HVAC experts provide trusted, top-rated air conditioning tune-up and cleaning services for homeowners across the Upstate, so you don’t have to sacrifice your valuable time and peace of mind.

Our thorough inspection and cleaning process includes everything from air filter checks to coil cleaning and drain line flushing. We tailor our services to your system's make and model, ensuring that nothing gets overlooked.

Whether you're dealing with airflow issues, loud operation, or rising energy bills, our skilled technicians can help. If your unit shows signs of wear beyond repair, Corley also offers air conditioning replacement services to restore your comfort quickly. Give our staff a call at (864) 256-0643 to receive assistance with a defective air conditioning system.

Air conditioners rely on various components to provide effective cooling, with the evaporator and condenser coils being among the most crucial. When these coils accumulate dirt, the system’s efficiency can drop significantly, leading to inadequate cooling performance.

Drawing on decades of expertise, we’ll highlight the key signs that your AC coils are dirty. By recognizing these warning signs, you can promptly arrange for cleaning services, helping to maintain efficiency and ensure your home stays cool.

Top Signs Your Air Conditioner Coils Need to Be Cleaned

Here are the top signs to look out for when your AC coils are dirty:

1. Reduced Cooling Output

One of the most identifiable signs is a reduced cooling output from the air conditioner. If you notice your home isn’t being properly cooled or only warm air is coming out of the vents, dirty AC coils could be the reason.

As dirt and debris begin to accumulate on the air conditioner’s coils, a layer of insulation is created that prevents the coils from absorbing heat from the air indoors. This occurrence can also restrict air passages, reducing the amount of air that is supposed to come into contact with the coils.

The consequences of these issues are:

Lower cooling performance
Reduced air circulation
Diminished cooling capacity of the AC system
Higher monthly utility bills

2. Increased Energy Consumption

When AC coils are dirty, they can cause your HVAC system to work harder than usual. This increased workload makes it harder for the system to maintain desired temperatures and increases energy consumption.

Dirty coils in HVAC systems hinder heat absorption and transfer, driving up energy consumption. This can also make it difficult for the system to maintain refrigerant pressure, another reason for increased energy consumption.

If you notice an unexpected rise in your energy bills and cannot determine the cause, dirty AC coils could be the culprit.

3. Frequent Cycling

Have you noticed that your HVAC system is turning on and off more than usual? Dirty AC coils could be responsible for that troublesome, frequent cycling.

Pressure and temperature can vary across dirty evaporator coils, causing increased intervals of cycling as the system struggles to compensate. This system inefficiency only leads to more issues.

4. Ice Formation on the Coils

One of the more puzzling signs is ice formation. Since your AC’s dirty coils can’t properly absorb heat from the air, the drop in temperature can plummet to below freezing. The moisture in the air then freezes on the coil surface, potentially forming ice. Not only does this hinder system efficiency, but coil damage is also possible.

5. Strange Odors

Are you starting to notice foul odors coming from your HVAC system?

Moisture around the coils creates the perfect environment for mold and mildew growth. Once present, mold and mildew can emit rotten or musty smells, seriously affecting indoor air quality and the health of the home’s occupants.

Another possibility is volatile organic compounds, or VOCs. VOCs are chemicals from sources like cleaning products, furnishings, and paints that can accumulate on the AC’s coils. When VOCs are heated, they give off an unpleasant odor and can potentially create health hazards in your indoor living spaces.

AC Coil Types

Central air conditioning systems have an indoor and outdoor unit, each with its own coil:

The indoor unit houses the evaporator coil, which absorbs heat from the inside air.
The outdoor unit houses the condenser coil, which releases captured heat outside.

Why Is It Important to Clean AC Coils?

Cleaning the dirty coils in HVAC systems is crucial because of the moisture generated during the cooling process and the air that flows over them. Dirt, dust, debris, and various pollutants from the air can quickly accumulate on the coils. Without regular cleaning, heat transfer becomes impaired, leading to ineffective cooling throughout the home.

By regularly cleaning your AC’s dirty coils, you ensure that the system runs efficiently, delivers the desired cooling, and reduces the risk of the mentioned issues occurring.

How Often Should AC Coils Be Cleaned?

Clean your AC coils at least once a year. If they get dirty easily, more frequent cleanings may be needed.

Schedule a professional cleaning service with the professionals from our HVAC company once a year before the summer so your home is properly prepared for the cooling season.

Professional Air Conditioning Repair Services

If your AC coils need to be cleaned, contact our staff at (864) 256-0643 to receive assistance. Our team members offer reputable air conditioning repair services in Greenville, South Carolina and have the tools necessary to remove excess dirt or debris in your HVAC system.

Our professionals also offer extensive air conditioning replacement and air conditioning maintenance services for homeowners and will work with you to keep your living space cool throughout the warm season.

Don’t let yourself struggle through the summer heat without proper cooling. Contact our team today for support.

Out of sight and out of mind, it can be easy to forget the air ducts of your home. It is imperative for the performance of your HVAC system and the health of your family that your air ducts stay clean. Dirty air ducts may start with small complications, but the longer they go unaddressed, the bigger problems such as a broken HVAC system or health issues can result.

How do you truly know when you have dirty air ducts? To help you diagnose HVAC issues, we have created a comprehensive outline of the most common signs of dirty air ducts and what to keep an eye out for.

Do My Air Ducts Need to Be Cleaned?

The main signs your air ducts need cleaning include dusty vent grills, mold growth, strange odors, bad allergies, insect infestations, and reduced HVAC efficiency. If you notice these issues, it's advisable to have your air ducts professionally inspected and cleaned.

Below is an overview of common signs of dirty air ducts in homes:

1. Dusty Grills

The grill of your air ducts is the point that separates the ductwork from the wall. Your HVAC system is responsible for blowing cool or warm air through these vents into each room. A small amount of dust on these grills is fine; it’s when the dust accumulates into larger amounts that it becomes a sign of dirty air ducts.

Dusty grills start to become an issue when too much dust is being blown through the inside of the air ducts. Wipe down the grill as best as you can and reach out for professional air duct cleaning services. By making routine cleaning for your air ducts a priority, this is less likely to occur.

2. Mold

Not only is mold growth a clear indication it’s time to schedule cleaning services—it can also be harmful. Due to the common occurrence of condensation buildup within the HVAC system, mold can potentially grow near the grills of your air ducts.

Further complicating the issue, once mold spores travel through the vents and into your home, growth can manifest elsewhere. Due to potential health problems for those in the household, any sign of mold growth should be taken seriously and addressed immediately.

3. Bad Allergies

Are allergies spiking out of nowhere? Dirty air ducts could be the culprit. Dirty air ducts carry and push unclean air particles into the rooms of your home, causing allergies to flare. If this sign applies to members of your household, check the air ducts. If they seem dirty, turn to professional air duct cleaning services to improve your indoor air quality.

4. High Utility Bills

Another common sign of dirty air ducts is higher than normal energy bills. As air ducts get dirtier, your furnace and central air conditioning system is forced to work harder, driving up the amount of energy it’s consuming and increasing utility costs.

It’s a common occurrence for homeowners to not realize their air ducts are dirty until the energy bill comes back higher. Have a professional HVAC technician inspect your air ducts to determine if this is indeed the issue—proper solutions can be taken from there.

5. Poor Respiratory Health

Have you or anyone else in your house encountered unexplained poor respiratory health? Maybe a cold that won’t go away or continuous coughing? Harmful contaminants from your air ducts could be the reason. Dust, and other particles stemming from your dirty air ducts can affect indoor air quality and lead to a potential decline in respiratory health.

Don’t let these health effects linger. Get in touch with a professional from our Greenville, SC HVAC company to determine if dirty air ducts are the issue. Proper cleaning measures to improve the air quality of your home can then be taken if that’s indeed the culprit.

6. Bad Air Flow

Sufficient air circulation out of your HVAC system is essential for home comfort. Dirty air ducts can throw a serious wrench in that function. The more dirt and other grime begin to accumulate inside your air ducts, the less airflow you’ll get out of the vents. Stale air, compromised air quality, and other issues are more likely to follow.

Inspect the amount of dirt and debris on the grills to get a better idea if this is the issue. If it is, do your best to clear what you can around the grills and then contact an HVAC expert for an in-depth cleaning of your air ducts.

7. Insect Infestation

One of the more unsightly and repulsive signs of dirty air ducts is an insect infestation. At times, it can be tough to tell if the occurrence of an insect infestation is related to your air ducts or not.

No matter what, it’s important to take immediate action to prevent the insects from causing damage to your home. Turn to an HVAC professional, they’ll be able to determine if the infestation started due to dirty air ducts or elsewhere and follow up with the necessary cleaning procedures.

8. Rats

Making things worse, a rodent infestation is also another possibility. If a rodent infestation has started in your home, it’s a good idea to seek out professional air duct cleaning services as fast as possible. Other issues can arise if a rodent ends up dead within the air duct.

9. HVAC System is No Longer Efficient

Tied to other issues like higher utility bills, dirty air ducts can render your HVAC system inefficient. A properly functioning HVAC system cools and heats your home when you need it.

Dirty air ducts full of dirt and debris force the system to work harder, making it prone to short-cycling, insufficient or uneven comfort, and even a full breakdown. Seek out air duct cleaning services to restore your system’s efficiency.

10. Bad Odors

Bad odors stemming from your air ducts? Musty smells can start when the dust is being burned by the heat of the HVAC system and more foul odors could indicate a dead animal like a rodent. These odors are a clear indication of the need for air duct cleaning services.

Air Duct Cleaning Services

Do you notice these signs of dirty air ducts in your home? Luckily, our team members offer exceptional air duct cleaning services in Greenville, South Carolina and the surrounding locations. We also offer HVAC duct repair services to help fix leaky or damaged ductwork in your house.

If you need support with additional HVAC issues in your home, contact our team to receive support. We also offer a variety of other HVAC solutions including air conditioning repair, geothermal system installation, zone control system replacement, heat pump repair, and furnace installation. Our team of experienced professionals is ready to help you obtain the level of service your home needs for the utmost comfort and functionality.