Compressor HVAC: Service and Repair

Step 1 Measure voltage at compressor connector

1. Run the engine at idle.
2. Turn A/C and the blower switches ON.






3. Measure the voltage at the following terminal wire of the compressor connector.









Step 2 Measure voltage at magnetic clutch connector.

Measure the voltage at the following terminal wire of the magnetic clutch connector.

Step 3 Check magnetic clutch






1. Disconnect the magnetic clutch connector.






2. Check for continuity between the magnetic clutch and a body ground.

Step 4 Check thermal protector.






1. Turn the air conditioner OFF for about 10 minutes.






2. After 10 minutes check for continuity of the thermal protector.