Symptoms and causes of car air conditioner compressor not working and blower not working
Symptoms and possible causes of car air conditioning compressor not working
Fault description When the air-conditioning refrigeration switch is turned on, the compressor does not turn, but after turning on the blower switch, the blower can run
Poor contact of air conditioner refrigeration switch
Compressor electromagnetic clutch coil is short-circuited or open
Poor contact of pressure switch contacts
The air conditioner stops working and the relay contacts are in poor contact
The air conditioning controller is faulty
The coolant temperature sensor is faulty. The evaporator temperature sensor is faulty. The computer control relay contacts are in poor contact (electronic injection engine). There is an open circuit, short circuit or poor contact in the related connection lines and connectors.
The blower does not work
Symptom: When the air conditioner is switched on, the compressor can rotate, but after the blower switch is switched on, the blower cannot operate
the reason:
Blower motor failure
Blower motor control module failure
The blower switch is faulty
The related circuit and connector have open circuit, short circuit or poor contact
The compressor and blower are not working
After turning on the air conditioner refrigeration switch and the blower switch, the compressor does not turn, and the blower does not run
the reason:
Poor contact of air conditioner relay
Air conditioner relay coil is open or shorted
The related circuit and connector are faulty, short-circuited or poorly connected
Low speed fan relay failure
