Central Air Conditioner Blower Fan Not Working

To determine if the thermostat is defective set the air conditioner to cooling and then use a multimeter to test the thermostat for continuity.

Central air conditioner blower fan not working.

If the thermostat is defective it may prevent the fan from working. While each component in a central air conditioner is critical quite simply the unit will not work if the fan is not running. If it s cloudy and relatively cool outside but feeling stuffy in your home running the fan for an hour or so can certainly help. Refrigerant leaks resulting in your air conditioning freezing up.

It is common for the contactor to go bad over time which restricts the outside fan from working properly. The air filter needs to be changed. Your system s air filter traps dust dirt and other airborne pollutants to keep indoor air and internal cooling system components cleaner. An air conditioner contactor is an electrical switch that controls the compressor and condenser fan motor.

Another common and easily remedied situation that sometimes results in a central air conditioner fan not working is a dirty clogged air filter. If you don t want to turn the fan off and on all of the time there are some new technologies that will allow you to program the blower fan to run for 10 to 15 minutes each hour. Central air conditioners can work for years without problems if properly maintained and serviced annually. Blower and fan noises such as squeaks squeals and rattles may be transmitted through the duct system.

But before you phone see if the problem is caused by something else. The unit stops working. The compressor the indoor blower fan and outdoor fan. Make sure the switch on the side of the thermostat is set to cool instead of heat that will ensure that the proper mechanical system.

If you have your system inspected and cleaned annually it should run without any trouble. If it s conditioning not cooling this could be why. If they aren t working properly call a trained technician. When the air temperature rises above a set point the thermostat activates a switch to provide power to the fan and compressor.

Capacitors send an electrical jolt to start a motor a start capacitor or to keep one running a run capacitor in an air conditioning system capacitors work with three different motors. Most thermostats control both central air and central heat. The blower is going bad or out of balance.