How To Fix an AC That’s Blowing Warm Air

The last thing you want to experience on a sweltering summer day is an air conditioner that’s not cooling your home. Unfortunately, these complex systems can develop problems at any time, resulting in a lack of chilled air from your property’s vents.

At Rogers Heating & Cooling, we want all customers in and around South Boston, Virginia to have comfortable indoor spaces with reliable air conditioning. Learn how to fix an AC blowing warm air in our guide below.

Why Air Conditioning Units Stop Blowing Chilled Air

If you notice lukewarm airflow coming out of your vents while your air conditioner is running, it could be due to a dirty air filter. The filter is a screen that traps airborne pollutants and debris. Unfortunately, a clogged filter will restrict airflow and force the air conditioning unit to overwork itself, causing it to disperse warm air instead of cool air.

Other reasons a cooling unit blows warm air include:

• Blocked vents
• Compressor failure
• Incorrect thermostat settings or device failure
• Low refrigerant levels
• Capacitor issues

Steps for Fixing an Air Conditioner That’s Blowing Warm Air

Learn how to fix an AC blowing warm air with the tips below.

Check the Thermostat

One of the first things you should check when your air conditioner’s performance is lacking is the thermostat. It’s possible for you or somebody else in your home to accidentally put the thermostat on its “fan” setting, which will cause your HVAC system to circulate warm air without chilling it first.

The fan is likely the culprit if your thermostat says “on.” The air conditioner needs to be on a “cool” or “auto” function to remove warmth and moisture from indoor air to cool the property.

Replace or Clean the Air Filter

Ideally, you should change your HVAC filters once every season. Still, you might need to change it earlier than usual if you have a furry pet or a dusty home.

Inspect the Coils for Ice

Dirty coils can cause a host of problems. When evaporator coils in the air handler get filthy, they can’t manage an effective heat transfer to cool air. Instead, the coils freeze.

To fix this problem, you must thaw your air conditioner by powering it off. Then you should clear the condensate drain and let the ice defrost fully before turning your system back on.

Consider the Possibility of a Refrigerant Leak

Air conditioners need a specific amount of refrigerant to work effectively. Because refrigerant flows on a closed circuit, a professional inspection might be necessary to check for leaks and recharge the refrigerant.

Let Our Professionals Restore Your Air Conditioner’s Performance

Sometimes knowing how to fix an AC blowing warm air isn’t enough. These systems are complex and often require professional intervention, which our Rogers Heating & Cooling team can provide.

As one of the top HVAC and electrical companies serving South Boston, Virginia, and all of Halifax County, our licensed technicians know how to thoroughly inspect air conditioners, uncover performance problems, and implement the best solutions. We offer 100% satisfaction — call (434) 230-0093 today to schedule an inspection and learn more.