Pressure Relief Valve On A/C Compressor, Checking

Special tools and workshop equipment required

A/C Service Station:VAS6007A (or succeeding model)

The Pressure Relief Valve Protects the Entire Refrigerant Circuit Against Excessive Pressure.

CAUTION:

There is a risk of frostbite from the refrigerant. The pressure relief valve drains refrigerant when the engine is running and the refrigerant circuit pressure is too high.

Frostbite on the skin and other parts of the body is possible.

- Wear safety gloves.

- Wear protective eyewear.

- Turn the engine off.

Pressure Relief Valve on A/C Compressor (Denso)

Fig 1: Pressure Relief Valve on A/C Compressor (Denso)

Courtesy of AUDI OF AMERICA, LLC

The pressure relief valve -arrow- has activated if refrigerant oil is found in the close vicinity.
In this case, check the previously described capacity for the refrigerant circuit.
Drain the coolant with the A/C Service Station from the refrigerant circuit and fill it up to the specified capacity.

NOTE:

For other A/C compressor manufactures the relief valve is located in a similar place.