Why Is My AC Blowing Warm Air?

Posted On: June 30, 2021

Now that temperatures are really heating up and summer is in full swing, your AC unit is going to be put to the test. The hotter the temps, the harder our air conditioners work to keep us cool!

One issue that often occurs in the hottest months is your HVAC system blowing out warm air instead of cool. There are some top reasons this occurs, and we wanted to shed light on them so you are aware and can get your system working properly!

Common Reasons For Air Conditioners Blowing Warm Air

Here are some of the most common reasons that air conditioning units blow warm air:

  1. Thermostat setting errors – If your AC is blowing warm air, this could be a simple solution. Your thermostat might have the blower fan set to ON instead of AUTO, which will cause it to run all the time, not just during the cooling cycle. In between these cooling cycles, warm air will be blown from the vents. Try switching your thermostat’s settings or calling a Short Pump Heating & Air technician to ensure you have your thermostat set to your family’s schedule and preferences.
  2. Dirty air filters – It’s so important to change your filters every couple of months. Take a look at your system’s manual, or ask Short Pump Heating & Air to look at your system and recommend the frequency of cleaning or changing your filters.  A dirty air filter can’t properly move air through your system and home, which can then cause warm air to come out of the vents.
  3. A refrigerant leak – If there’s a leak in refrigerant, your AC doesn’t have the right charge to complete its cooling cycles. If you think this is the reason for warm air blowing into your home, give Short Pump Heating & Air a call. One of our expert technicians will come and repair it so your system can function properly.
  4. A frozen evaporator coil – All HVAC systems have evaporator coils whose main job is to extract heat from your home’s airflow and start the process of cooling. This creates condensation that should land in your system’s drip pan. However, sometimes this moisture collects on the evaporator coils, causing them to freeze and prevent heat transfer, ultimately resulting in warm air blowing out of your system. When this happens, your best option is to call Short Pump Heating & Air for a repair.

Some of these are easy fixes, but some take a licensed HVAC professional to repair properly.

When in doubt, contact Short Pump Heating & Air at 804-364-9040 to come out and take a look. We’ll talk you through any questions you have or send any of our expert technicians out to get you back up and running!

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