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HomeRepair HelpHaier A/C RepairHaier Air conditioner compressor won't run Repair
Haier Air conditioner compressor won't run
If your Haier 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, which can power the fan motor while leaving the compressor off. Next, check the temperature control board, since it supplies voltage to both the fan motor and compressor, but confirm the overload, capacitor, and compressor are good before replacing a board. A faulty thermostat can also keep the compressor from receiving power when the room warms above the set temperature. The compressor overload is another common failure point, and you can test it for continuity with a multimeter. A bad compressor is possible, but it is less often the first problem and should be replaced only by a licensed technician. A failed thermistor can also cause an AC compressor not turning on by sending bad temperature information to the control board. Enter your model number on RepairClinic.com to find the exact Haier replacement part for your specific air conditioner.
01 - Haier 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 - Haier 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 - Haier 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 - Haier 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 - Haier 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 - Haier 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 Haier air conditioner compressor not turning on?
How do I test a Haier air conditioner overload if the compressor is not working?
Can a bad thermistor cause a Haier AC compressor not to start?
Should I replace the control board if my Haier air conditioner compressor won't run?
How do I find the right Haier air conditioner part for a compressor that will not run?
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