Fan On Air Conditioner Won T Turn Off

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.

Fan on air conditioner won t turn off.

If there is an air conditioner remove the screws to the control panel and pull it off. This will be a set of contacts that are normally open. These same diagnostics also aid in air conditioning blower assembly diagnosis when an a c blower continues running. If it does the problem is not likely the thermostat.

There are some serious problems that can cause these issues but typically when your ac won t turn on you have about a 70 chance of solving the issue yourself. 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. Check across the fan terminals. This article describes what to check if the furnace or forced air blower fan does not stop when you expect it to do so.

Blower fan won t shut off. Forced air heating or cooling air handler troubleshooting. Your hvac fan should turn on and off with the rest of your heating and cooling system. 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.

If the unit continues to run it may be the thermostat. Why won t your hvac fan turn off. With a voltmeter check across the low voltage coil. Turn the thermostat up to a temperature at or near the outside temperature.

To turn the blower fan off simply set your thermostat to the auto option. Blowr fan won t stop. The most common reason that your air conditioner fan won t turn off is because a stuck relay keeping the circuit closed. The condenser coils dissipate the heat as the refrigerant passes through the coils.

Locate the fan relay. As debris builds up on the coils the air conditioner will become less efficient causing the air conditioner to work harder to cool down. 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. Wait to see if the air conditioning unit fan eventually shuts off.

Remove and replace it with a new thermostat. If the thermostat is not calling for cooling there will be no voltage present. Before calling your service technician out to start replacing components check the thermostat settings first. Air conditioner is turned off but fan keeps running.