Air Conditioner Motor Not Working

An air conditioner contactor is an electrical switch that controls the compressor and condenser fan motor.

Air conditioner motor not working.

If the relay board isn t working properly the fan might not run. Air conditioner fans not working can be a sign of a frozen evaporator coil. The evaporator coil sits inside your home within the air handler unit furnace or fan coil pulling heat and humidity from indoor air as it passes through. It is common for the contactor to go bad over time which restricts the outside fan from working properly.

Do not touch the capacitor terminals or you may get shocked. The relay board provides voltage to many components of the air conditioner including the fan motor. If it s clogged with dirt or other debris you won t get any air flow. Remove the service panel on the a c unit.

Do not proceed if you re not sure you ve properly shut off the power. Shut off the power supply to the air conditioner at the disconnect or breaker panel. Most ac systems are designed to work within a large range of temperature variants and environments however due to numerous causes the air conditioner is still prone to overheating. Another common problem with the air conditioner blower motor not starting up is caused by overheating.

Before replacing the board make sure you check more commonly defective parts particularly the fan motor capacitor and the fan motor itself. If your ac system turns on but doesn t blow out cold air ensure all the vents are open and the thermostat is set properly. It s located on the side of the building near the outdoor a c unit. Relay boards are often misdiagnosed.