Compressor HVAC: Service and Repair

See Diagrams/Exploded views for an image of the A/C compressor and mountings.

A/C Compressor With High Pressure Relief Valve:

CAUTION:
- If the A/C compressor or the condenser is replaced during repairs, check that at least one pressure relief valve remains in the system.

Since November 1987, A/C compressors with a high pressure relief valve are being installed on Audi 80/90 vehicles with 4 cyl. motors.

With the installation of these compressors, the high pressure relief valve on the condenser has been eliminated.