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Why Is the Air Conditioning Fan Always Running?
Monday, May 18, 2015
Indoor Air Conditioning

Learn some of the answers to questions about your heating and air conditioning.

Heating and air conditioning can be a big mystery, especially when something goes wrong. What happens if your A/C fan is always running? Here are some troubleshooting tips you can use if this happens to you:

Check the Thermostat

There are two things to check on your thermostat if your air conditioner fan runs continuously.

First, check the temperature setting. If it’s set too low the A/C might not be able to keep up with demand. Turn the temperature setting higher than the room temperature. If the fan shuts off, that was the problem.

Second, check the fan switch. If it’s set to “on,” switch it to “auto” or “off” and see if the fan shuts off. If not, it’s not the fan switch.

Check the Fan Limit Switch

Take a look at the blower on your cooling system. There should be a fan limit switch. If the switch is set to “manual,” it means the blower will run constantly. You want to switch it to “auto.” This allows the thermostat to control when the blower turns on and off based on demand.

If neither of these tips turn the air conditioner fan off, it might be time for a service call. A licensed technician can evaluate the situation and determine what could be the cause. If repairs are needed, they can do them while they are there.

If your air conditioner fan won’t turn off and you’ve done some troubleshooting, the next step is to call All City Heat and Air for a heating and air conditioning service call by contacting us or calling 704-545-2000.

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