Compressor, Replacing Due to Leakage or Internal Damage
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
For example, because of noise or no compressor output
- Discharge refrigerant circuit.
- Remove compressor.
NOTE:
- In the event of internal damage (compressor), check refrigerant hoses and condenser. If, e.g., swarf has penetrated, clean refrigerant hoses and condenser (flush with refrigerant R134a → Refrigerant Circuit, Flushing with Refrigerant R134a or blow through using compressed air or nitrogen → Refrigerant Circuit, Flushing with Compressed Air and Nitrogen ), replace refrigerant hoses if necessary.
- In vehicles with two evaporators, the refrigerant oil quantity in refrigerant circuit may be greater than the quantity already filled in the replacement compressor, if necessary add the remaining refrigerant oil quantity to the refrigerant circuit → Refrigerant Circuit, Flushing with Compressed Air and Nitrogen .
- Replace dryer cartridge, receiver or reservoir and restrictor.
- Examine expansion valve for dirt or corrosion and replace if necessary.
- Assemble, evacuate and charge refrigerant circuit.