LEMON Manuals: Even more car manuals for everyone
Home >> Cadillac >> 2021 >> CT4 Sport, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 230 (Heating, Ventilation, And Air Conditioning - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Air Conditioning Compressor Oil Diagnosis

Air Conditioning Compressor Oil Diagnosis

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.
Condition Corrective Action
CAUTION:

Always ensure the correct refrigerant oil is used during A/C servicing of R-134a or R-1234YF systems. Failure to use the correct refrigerant oil could cause A/C performance issues and/or A/C system failure.

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.
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.
  • 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 thermal expansion valve (TXV).
  • If the system is equipped with rear auxiliary air conditioning, it will be necessary to clean or replace the filter in the rear auxiliary line.
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.
Dark brown/black and/or pungent/unusual odor 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.
  • 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 thermal expansion valve (TXV).
  • If the system is equipped with rear auxiliary air conditioning, it will be necessary to clean or replace the filter in the rear auxiliary line.
  • Flush refrigerant system.
Oil Overcharge Flush refrigerant system.
Refrigerant Contamination Flush refrigerant system.
scientia non olet · About LEMON Manuals