Why Does The Fan Keep Running On My Air Conditioner? 5 Best Reasons!

Why does the fan keep running on my air conditioner? The fan of your air conditioner may have stayed on for some reason. A well-functioning AC does improve the comfort of our homes, especially on hot summer days.

However, if it produces bothersome noises and the fans do not turn on and off as they should, there may be an issue with the AC system. As part of the heating and cooling cycles, the AC system should switch on and off.

That’s also why it makes sounds we’re used to hearing. If you start hearing weird noises or notice that your fan seems to run constantly, it’s a sign that you should check it. Continue reading to discover how to diagnose your AC fan that won’t stop running correctly. Then, learn a handful of steps on how to troubleshoot it.

 

Why  Does The Fan Keep Running On Your Air Conditioner?

Here are some reasons why does the fan keep running on my air conditioner.

 

Reason #1. The fan is set to “ON” instead of “AUTO”

One of the most common reasons your air conditioner’s fan remains running is that it is set to ON. If this is the case, the fan will continue to operate even if the air conditioner’s cooling component is turned off.

Switch your air conditioner on AUTO to fix this issue. The fan and the AC’s cooling system function jointly to keep your home cold, but they don’t automatically operate together.

After you set the fan to AUTO, it will only perform when the cooling system is running. Once it identifies the ideal room temperature, it will switch off automatically. If you’ve already set it to AUTO but still experience trouble, the cause may be among the others listed below.

 

Reason #2. The AC is incompatible with the thermostat setting because it’s undersized

Since the air conditioner is too small, it will not perform as effectively as it should. It will struggle to cope with the thermostat setting, so it will continue to run, eventually causing the fan to stay on.

The same thing happens if the outside temperature is too high. The cooling unit of the air conditioner will find it tough to lower the temperature or cool the house. So it will run for an abnormally long time to reach the temperature you set.

If you suspect this is the issue with your air conditioner, try setting it to a temperature of 5 to 10 degrees. If it turns off automatically, your air conditioner is too small for your home.

Especially when the natural temperature is too high, an AC that is too tiny will find it harder to meet your desired coolness. If this is the case, it will compel the fan to run continually. If you have this problem, you should probably call an expert or replace your air conditioner.

 

Reason #3. There is a problem with your thermostat

If your thermostat fails to detect your home’s inside temperature accurately. The fan will turn on it even if it isn’t supposed to.

You will know that you have a defective thermostat if the temperature in your house is lower than what you set on the thermostat. To correct this issue, you must either replace the thermostat or hire an AC technician to fix it.

 

Reason #4. Malfunctioning relay switch

The fan should only run when the air conditioner unit is turned on. If the fan does otherwise, there is most likely a problem with the relay switch.

The intended temperature set on the thermostat will not be transmitted to the fan if the relay switch fails.  If the fan is unable to receive orders from the thermostat, it will eventually continue to run.

 

Reason #5. Short circuit

A short circuit is another possible cause. The identification of on and off signals will be impossible due to the short circuit.

When there’s a short circuit, and you have already turned your AC off, it will not register the command to the fan, so it will keep running. Have it examined by an expert with air conditioners, precisely like the other suggestions above.

 

Easy Steps On Troubleshooting The Air Conditioner

If you’re not sure what’s causing your AC fan to run continually, you should do a troubleshooting procedure. You can complete it in three simple steps. Here’s how to do it:

 

Step #1. Set the fan to AUTO

Try to see if your fan is set to ON. When you set it to AUTO, the fan will only function when the AC unit is switched on.

 

Step #2. Switch the fan back to auto mode after it has been turned off

If the fan does not turn off after you do this, the thermostat is probably broken. To replace or repair your thermostat, seek assistance from an AC professional.

 

Step #3. Set a maintenance plan

If you can’t come up with a diagnosis after completing the first two steps, there could be a problem with how your AC unit copes with the thermostat.

But, again, regular maintenance is the most effective way to help recover the system’s optimal performance.

 

Conclusion

If you can’t come up with a diagnosis after completing the first two steps, there could be a problem with how your AC unit copes with the thermostat.

But, again, regular maintenance is the most effective way to help recover the system’s optimal performance.

An air conditioner is an essential piece of equipment in our homes that significantly influences our comfort, mood, and even health.  Therefore, we must keep them functional and well-maintained.

Furthermore, be aware of the potential causes of its dysfunction and demonstrate techniques in identifying the problem, such as troubleshooting.

Knowledgeable ones consistently earn an advantage. That’s all for “why does the fan keep running on my air conditioner? “ I hope you were able to learn something from this text. For more interesting articles, click here.

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