Why is My Air Conditioner Blowing Hot Air?

Keep Cool by the Pool

Summer is time to enjoy cooling off by the pool or lake, but remember that while you are relaxing your AC is running all day. What happens when suddenly your air conditioning unit starts blowing hot air?

Here are a few things that could be the cause:

Your Thermostat
Sometimes the simplest explanations are the hardest to see and the most difficult to remember. It is a common mistake that the thermostat is incorrectly set to ‘heat’ when you want it set on cool. Also, check the ‘auto’ setting or if the fan is set to ‘on’ – this means the fan will run even if the AC is not set to cool.

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. If the filter is doing its job the way it is supposed to, it will collect dirt and debris and need to be replaced regularly. Neglecting to change these according to your manufacturer’s recommendation can result in hot air.

Inside and Outside Units Turned On and In Good Repair
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 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 check for dirty coils, this can be another culprit for hot air.

Problems for the Pros
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.
Call us today or request service online for more information on diagnosing and troubleshooting your AC issues.

If you are in Hendersonville, Nashville or the surrounding communities, please call the air conditioning experts at Kimbro Air or request service online. If you are not sure if you are covered by us, visit our service area page or call our office to find out what we can do for you.


Kimbro Air proudly provides HVAC service to Hendersonville, Nashville, Bellevue, Bordeaux, Brentwood, Franklin, Gallatin, Goodlettsville, Hermitage, Madison, Mt. Juliet, White House and the surrounding communities. Visit our service area page for more coverage details, call us at 615-824-8098, or request service online today.

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