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Air Conditioning Compressor Oil Diagnosis

Air Conditioning Compressor Oil Diagnosis


Note

To avoid repeat compressor failure, always inspect the condition of the refrigerant oil and take the appropriate corrective action before installing the replacement compressor.


Condition Corrective Action
Clean Oil no debris present No corrective action necessary.
Clean Oil with debris present
Inspect the suction port of the replacement compressor for presence of a suction screen. If the Replacement Compressor does NOT contain a suction screen, Install Suction Screen in the line.

Replace desiccant or component containing the desiccant.

Replace desiccant filter if applicable.

Remove and inspect high pressure side filter (if applicable) .

Remove, inspect, clean, or replace orifice tube .

If the system has a front orifice tube and is equipped with a filter in the rear auxiliary line, remove, inspect, clean, or replace the filter.

If the system has a front orifice tube and is not equipped with a filter in the rear auxiliary line, remove the filter in the auxiliary TXV and Install a universal inline A/C Filter P/N 89016656 (AC Delco P/N 15-10413) as close to the rear TXV as possible.


Dark brown/black and/or pungent/unusual odor with no debris present
Replace desiccant or component containing the desiccant.

Replace desiccant filter if applicable.

Flush refrigerant system. Refer to Flushing


Dark brown/black and/or pungent/unusual odor with debris present
Replace desiccant or component containing the desiccant.

Replace desiccant filter if applicable.

Flush refrigerant system. Refer to Flushing

Inspect the suction port of the replacement compressor for presence of a suction screen. If the replacement compressor does NOT contain a suction screen, install suction screen.

Remove and inspect high pressure side filter (if applicable).

Remove, inspect, clean, or replace orifice tube .

If the system has a front orifice tube and is equipped with a filter in the rear auxiliary line, remove, inspect, clean, or replace the filter.

If the system has a front orifice tube and is not equipped with a filter in the rear auxiliary line, remove the filter in the auxiliary TXV and Install a universal inline A/C Filter P/N 89016656 (AC Delco P/N 15-10413) as close to the rear TXV as possible.


Oil Overcharge Flush refrigerant system. Refer to Flushing
Refrigerant Contamination Flush refrigerant system. Refer to Flushing
Hybrid Polyolester Refrigerant Oil (POE) Contamination
Flush refrigerant system. Refer to Flushing

Replace desiccant or component containing the desiccant.

Replace desiccant filter if applicable.