Why is my Air Conditioner Blowing Hot Air?


The sun is shining in Tennessee so while you’re enjoying the pool or the lake don’t forget your AC has been running a lot.

What happens when your air conditioning unit starts blowing warm or hot air? Here are a few simple things that you can check before you contact us for service.



Check Your Thermostat


Sometimes the simplest solutions are the easiest to forget. First, check to make sure your thermostat is set to “cooling “mode. Next, check that the fan is set to “auto”. This means the fan will only run when your cooling system is running.



Airflow Restriction/Clogged Air Filter


When was the last time you changed your air filter? The air filter protects your unit by filtering out dirt and debris from the air. Your filter must be replaced regularly or it will become clogged. Neglecting to change your filter according to your manufacturer’s recommendation can result in decreased cooling power.



Inside and Outside Units Turned On and In Good Repair

If you have a split system, your AC unit needs both an inside and an outside unit to operate. The inside unit has a fan that blows air through the house and needs the outside unit to provide cool air for it to push around. Check if that both your inside and outside units are turned on and functioning properly. Check the outside unit for ice which can cause a malfunction in the compression coil, hence the warm air. Also double check that your coils aren’t dirty as this can be another cause for warm air.

Other more troublesome problems include refrigerant leaks, bad compressors and/or electrical problems and failures. These problems require a professional to diagnose and fix. Refrigerant leaks can be dangerous, and compressors are complicated and can often be misdiagnosed if inspected by someone unqualified to do so.

If you are in Knoxville, Farragut, Lenoir City, Alcoa or any of the surrounding communities, call one of the experts at AA-Air Company and we can diagnose and troubleshoot your AC issues. Visit our service area page and if you don’t see your city listed, please call us for more information.