How to Check a Car Air Conditioning Compressor?

1 Answers
VeraAnn
07/30/25 6:51am
Check a car air conditioning compressor by following these steps: 1. Check the compressor's sealing: Connect the high and low-pressure hoses of the manifold gauge to the compressor's high and low-pressure service valves, then start the engine and let it idle at 2000 rpm; 2. Measure the resistance value of the compressor's electromagnetic clutch: First remove the electromagnetic clutch coil from the compressor, then measure its resistance with a multimeter; 3. Check the compressor's operating condition: Mainly check if the drive belt is broken or loose. If the belt is too loose, it will slip, accelerate wear, and fail to transmit power. Also, check for internal noise in the compressor and whether the compressor clutch is slipping.
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