Air Conditioning Compressor Oil Diagnosis
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Air Conditioning Compressor Oil Diagnosis
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Note
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To avoid repeat compressor failure, always inspect the condition of the refrigerant oil and take the appropriate corrective action before installing the replacement compressor.
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Condition
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Corrective Action
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Clean Oil no debris present
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No corrective action necessary.
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Clean Oil with debris present
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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.
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Replace desiccant or component containing the desiccant.
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Replace desiccant filter if applicable.
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Remove and inspect high pressure side filter (if applicable) .
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Remove, inspect, clean, or replace orifice tube .
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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.
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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.
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Dark brown/black and/or pungent/unusual odor with no debris present
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Replace desiccant or component containing the desiccant.
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Replace desiccant filter if applicable.
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Flush refrigerant system. Refer to
Flushing
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Dark brown/black and/or pungent/unusual odor with debris present
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Replace desiccant or component containing the desiccant.
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Replace desiccant filter if applicable.
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Flush refrigerant system. Refer to
Flushing
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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.
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Remove and inspect high pressure side filter (if applicable).
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Remove, inspect, clean, or replace orifice tube .
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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.
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•
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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.
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Oil Overcharge
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Flush refrigerant system. Refer to
Flushing
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Refrigerant Contamination
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Flush refrigerant system. Refer to
Flushing
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Hybrid Polyolester Refrigerant Oil (POE) Contamination
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Flush refrigerant system. Refer to
Flushing
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Replace desiccant or component containing the desiccant.
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Replace desiccant filter if applicable.
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