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HomeRepair HelpFedders A/C RepairFedders Air conditioner compressor won't run Repair
Fedders Air conditioner compressor won't run
If your Fedders air conditioner compressor won't run, the fan may still blow but the unit will not cool properly because the compressor is not starting. The most likely cause is a failed temperature control thermostat with burned internal contacts, followed by a defective temperature control board that is no longer sending voltage to the compressor. A bad thermostat can also keep the compressor from receiving power, and a burned-out overload can stop the compressor to protect it from excessive current. The compressor itself can fail, but check the overload, capacitor, and related controls first, since a sealed-system compressor repair should be handled by a licensed technician. A faulty thermistor can also cause an AC compressor not turning on if it cannot report air temperature correctly to the control board. You can test many of these parts with a multimeter for continuity or voltage. Enter your Fedders model number on RepairClinic.com to find the exact temperature control thermostat, control board, overload, thermistor, capacitor, or other replacement part that fits your specific air conditioner.
01 - Fedders 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 - Fedders 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 - Fedders 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 - Fedders 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 - Fedders 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 - Fedders 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 won't my Fedders air conditioner compressor run?
Why is my Fedders air conditioner blowing warm air?
How do I test a Fedders air conditioner overload or thermistor?
Should I replace the compressor if my Fedders AC compressor is not turning on?
How do I find the right replacement part for my Fedders air conditioner?
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