Why Is My Air Conditioner Blowing Warm Air?

why is my air conditioner blowing warm airDon’t you hate it when you walk into your home looking for some relief from the hundred-degree heat only to feel warm air coming from your Air Conditioning unit? Believe it or not, this is a common problem with many homes in around the Phoenix and Mesa, AZ area. But, contrary to popular belief the solution is not as simple as some may think. In fact, there can be multiple reasons why your air conditioner is blowing warm air.

Here are a few reasons to consider.

Probable Cause #1 – Check the Thermostat Settings

Sometimes the simplest answers to a problem are the ones that are often never addressed – or overlooked. In this case, the reason your air conditioning unit is blowing warm air into your house might simply be due to the settings on the thermostat. Here are a few things to check on the thermostat:

  • Check to see if the switch reads heat or cool. Sometimes human error will cause heat to blow from the AC unit, so simply start by verifying that the thermostat or AC controller is set to ‘cool’ instead of ‘heat’ or ‘circulate’.

  • Check the temperature settings. In some cases, the thermostat will read one temperature but actually be out of calibration – causing warm air to blow out of your air conditioner. You can verify the settings, but you’ll need to contact an air conditioning service expert to calibrate this switch.

Probable Cause #2 – The Compressor or Condenser

Once you’ve verified that the thermostat is set to the appropriate settings, and your air conditioning unit is still blowing warm air inside your home, the next possible cause is the condenser or compressor components inside your air conditioning unit. Both of these items are located inside the actual AC unit, outside of the home. It’s recommended that you let an AC repair expert verify that these items are working correctly, but here are a few simple things you can do to check if this is where the problem is coming from:

  • Check to see if the power supply is turned off

  • See if there are any air flow restrictions on the outside of the unit. For example; is there a big tree branch or a bunch of dirt clogging up the outside filters?

Probable Cause #3 – Clogged Air Filters

One of the most overlooked elements to the complete air conditioning unit is the air filters, both outside in the unit and also inside the house in the duct work. These air filters are designed to work for a limited time and be changed out for proper air flow to occur. According to experts, air filters should be replaced every month – especially when you live in a desert area like Mesa, AZ. You can easily check the HVAC system filters inside the home – but should contact a service expert so replace and inspect the filters in the actual AC unit.

By verifying these three items, you’ll be better prepared to diagnose why your airconditioner is blowing warm air into your home – when you least expect it to occur.