Compressor HVAC: Testing and Inspection

Compressor Noise Troubleshooting





Procedure (1)
Check the entire refrigerant system for compressor oil and refrigerant leaks. If leakage is found, repair or replace as necessary.

Procedure (2)
Run the engine at a constant 3,000 - 4,000 rpm; then alternately switch the A/C compressor on and off (turn the A/C switch on and off). It the noise remains, turn the ignition switch to LOCK for 1 - 2 minutes. Start the engine again, hold its speed at 3,000 - 4,000 rpm, and alternately switch the A/C compressor on and off (turn the A/C switch on and off).

Procedure (3)
After replacing parts, add compressor oil as shown in the following table.