Central Air Conditioner Blower Fan Not Working

The air filter needs to be changed.

Central air conditioner blower fan not working.

An air conditioner contactor is an electrical switch that controls the compressor and condenser fan motor. When the air temperature rises above a set point the thermostat activates a switch to provide power to the fan and compressor. Refrigerant leaks resulting in your air conditioning freezing up. Fans in the central a c both pull air out of the room to be conditioned and have humidity removed and also push chilled air through the vents throughout the house.

If the thermostat is defective it may prevent the fan from working. The unit stops 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. The compressor the indoor blower fan and outdoor fan.

The blower is going bad or out of balance. Most thermostats control both central air and central heat. 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. It takes much more energy to get the outdoor fan going than it does to keep it running.

If it s conditioning not cooling this could be why. This is another part that must be repaired by a professional hvac contractor. If you have your system inspected and cleaned annually it should run without any trouble. Another common and easily remedied situation that sometimes results in a central air conditioner fan not working is a dirty clogged air filter.

It is common for the contactor to go bad over time which restricts the outside fan from working properly. 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. But before you phone see if the problem is caused by something else. Central air conditioners can work for years without problems if properly maintained and serviced annually.

If they aren t working properly call a trained technician. 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. While each component in a central air conditioner is critical quite simply the unit will not work if the fan is not running.