Fan On Air Conditioner Won T Turn Off

Check across the fan terminals.

Fan on air conditioner won t turn off.

If the unit continues to run it may be the thermostat. Before calling your service technician out to start replacing components check the thermostat settings first. The condenser coils dissipate the heat as the refrigerant passes through the coils. If the condenser coils are dirty they won t be able to dissipate the heat as effectively.

If it s not the relay your thermostat likely has a shorted cable or needs to be replaced. Turn the thermostat up to a temperature at or near the outside temperature. Blowr fan won t stop. If your air conditioner won t turn on it s important to troubleshoot a few key things before you call in an hvac technician as this can save you time and more importantly money.

As debris builds up on the coils the air conditioner will become less efficient causing the air conditioner to work harder to cool down. Wait to see if the air conditioning unit fan eventually shuts off. The most common reason that your air conditioner fan won t turn off is because a stuck relay keeping the circuit closed. Why won t your hvac fan turn off.

To turn the blower fan off simply set your thermostat to the auto option. With a voltmeter check across the low voltage coil. This will be a set of contacts that are normally open. If the thermostat is not calling for cooling there will be no voltage present.

If it does the problem is not likely the thermostat. Forced air heating or cooling air handler troubleshooting. These same diagnostics also aid in air conditioning blower assembly diagnosis when an a c blower continues running. If your blower fan is continuing to run after the system has already turned off and you made sure your thermostat isn t set to the on position then you ll want to try and pinpoint the issue.

It s normal for the fan to kick on a couple of minutes before heating starts or to stay on for a couple of minutes after cooling stops but your fan shouldn t run for hours on its own. Modern window air conditioners often use an electronic control board sometimes referred to as the pcb to control the functions of the individual components of the unit. Your hvac fan should turn on and off with the rest of your heating and cooling system. Blower fan won t shut off.

Locate the fan relay. This article describes what to check if the furnace or forced air blower fan does not stop when you expect it to do so. If there is an air conditioner remove the screws to the control panel and pull it off. Remove and replace it with a new thermostat.