What are the reasons for the car air conditioning compressor not turning?

[StMadeline]

The reasons for the car air conditioning compressor not turning are: 1. Severe internal wear of the compressor; 2. Refrigerant leakage; 3. Faulty temperature sensor solenoid valve; 4. Circuit system malfunction; 5. Loose connection of the compressor control line; 6. Insufficient gap in the compressor electromagnetic clutch; 7. Lack of lubricating oil in the electromagnetic clutch bearing. The function of the car air conditioning compressor is to compress and transport refrigerant vapor. Its working principle is: it inhales low-temperature and low-pressure refrigerant gas from the suction pipe, compresses it through the operation of the motor driving the piston, and then discharges high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the refrigeration cycle.