Compressor HVAC: Testing and Inspection

Climate Control System

Component Tests

A/C Compressor - External Leak Test

1. Install the appropriate adapter on the port of the A/C compressor, using the existing manifold retaining bolt.

2. Connect the high- and low-pressure lines of a manifold gauge set or a refrigerant recovery/recycling station such as the R-134a A/C service center to the corresponding fittings on the adapter.

3. Attach the center hose of a manifold gauge set to a refrigerant container standing in an upright position.

4. Hand-rotate the compressor shaft 10 complete revolutions to distribute the oil inside the A/C compressor.

5. Open the low-pressure gauge valve, the high-pressure gauge valve and the valve on the refrigerant container to allow the refrigerant vapor to flow into the A/C compressor.

6. Using the Refrigerant Leak Detector, check for leaks at the compressor shaft.

7. If a shaft seal leak is found, install a new compressor shaft seal. If an external leak is found, install a new A/C compressor.

8. When the leak test is complete, recover the refrigerant from the compressor.