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Why is My Air Conditioner Not Cooling?

No Air Conditioning Picture

We've been dealing with some extreme heat here in Knoxville this summer! Air conditioning systems have been working overtime. But what if your air conditioner isn't cooling your home? How do you know if the problem is a simple "do it yourself" fix or if it will require an A/C repair from a heating and cooling professional? Here are some basic troubleshooting tips that can help put you on the right track.

First, check to see if air is blowing from your vents. If it is blowing, but the air is warm:

1) It may seem obvious, but make sure your thermostat mode is set to cool or auto, instead of heat.

2) Is the fan setting switched to auto or on? If the fan is set to on, it will blow warm air when the air conditioner is not running and cool air when it is running. If this is the problem, simply switch the fan to auto.

3) If the fan is not the issue, take a look to see if your air filter is dirty or clogged. Air filters need to be replaced regularly to ensure your air conditioning system is running properly and producing clean, cool air.

If no air is blowing from your vents at all:

1) Quickly check the thermostat to make sure that the power to your A/C unit hasn't been accidentally turned off.

2) Look for the temperature setting on your thermostat. Make sure it is set to at least five degrees cooler than the current temperature in your house. Moving the target temperature into this range should cause the air conditioner to start blowing, if there is not a more complex problem. After the air starts blowing inside, go take a look at the outdoor unit to make sure it is running. If either the indoor unit, outdoor unit or both are not running after the thermostat has been set properly for cooling, it would be a good idea to check the circuit breakers.

3) Inspect the circuit breakers for both the outdoor unit and the indoor unit to make sure they haven't been accidentally turned off or tripped. Sometimes a breaker may not visibly appear to be tripped, but will actually be tripped internally. This requires turning the breaker to the off position and then back to the on position to reset it.

AC Technician Working on Air Conditioner

If the tips above were unsuccessful in getting your AC unit up and running again, you need to call a heating and air specialist who can diagnose the problem and perform the air conditioning repair needed to start cooling your home again. Chaffee Air would be happy to assist you with your AC repair in Knoxville today. Call on us!