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HomeRepair HelpWeatherKing A/C RepairWeatherKing Air conditioner compressor won't run Repair
WeatherKing Air conditioner compressor won't run
If your WeatherKing air conditioner compressor won’t run, the unit may still blow air while the cooling cycle never starts, leaving you with an AC compressor not turning on or an air conditioner compressor not working when it should. The most likely cause is a failed temperature control thermostat, since its contacts can burn out and stop sending power to the compressor even though the fan motor runs. Next, check the temperature control board, which supplies voltage to the fan motor and compressor, but do not replace it until you have tested more common failure points like the compressor overload, capacitor, and compressor. A faulty thermostat can also prevent the compressor from starting, while a burned-out overload may interrupt power if it has lost continuity. The compressor itself can fail, but that is less common and should be handled by a licensed technician. A bad thermistor can also keep the compressor from running. Enter your WeatherKing model number on RepairClinic.com to find the exact replacement thermostat, control board, overload, thermistor, capacitor, or other part that fits your air conditioner.
01 - WeatherKing Air Conditioner Temperature Control Thermostat
The temperature control thermostat has electrical contacts inside that burn out over time. It is possible for the thermostat to still turn on the fan motor but not the compressor motor.
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Highly Likely
02 - WeatherKing Air Conditioner Temperature Control Board
The temperature control board provides voltage to the fan motor and compressor. If the control board is defective, it may stop providing voltage to the compressor. Control boards are often misdiagnosed. Before replacing the temperature control board, make sure you check more commonly defective parts—particularly the compressor overload, capacitor and the compressor itself. If you are certain that all of the other components are working properly, replace the temperature control board.
Highly Likely
03 - WeatherKing Air Conditioner Thermostat
The thermostat monitors the temperature of the air. When the air temperature rises above a set point, the thermostat activates a switch to provide power to the fan and compressor. If the thermostat is defective, it may prevent the compressor from running. If you determine that the compressor is at fault, replace it.
Highly Likely
04 - WeatherKing Air Conditioner Overload
The overload protects the compressor from burning out if it draws too much current. Over time, the overload can burn out. To determine if the overload is burned out, use a multimeter to test the overload for continuity. If the overload does not have continuity, replace it.
Highly Likely
05 - WeatherKing Air Conditioner Compressor
The compressor itself might be defective. However, this is not usually the case. Before replacing the compressor, be sure to check more commonly defective components—particularly the overload protector and the compressor capacitor. If the compressor is defective, it should only be replaced by a licensed technician.
Highly Likely
06 - WeatherKing Air Conditioner Thermistor
The thermistor is a sensor connected to the control board that detects the temperature of the outside air. If the thermistor does not have continuity, it can prevent the compressor from running. To determine if the thermistor is at fault, use a multimeter to test it for continuity. If the thermistor does not have continuity, replace it.
Common
Frequently Asked Questions
Why is my WeatherKing air conditioner compressor not turning on?
Can a bad thermostat cause a WeatherKing AC compressor not to start?
Should I replace the WeatherKing compressor if my air conditioner is not cooling?
How do I test the overload or thermistor on a WeatherKing air conditioner?
How do I find the right WeatherKing air conditioner replacement part?
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