Pressure Relief Valve On A/C Compressor, Checking

Checking

Function: Protects the 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.

Denso A/C Compressor Relief Valve.

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

The pressure relief valve -arrow- has operated when refrigerant oil is found in the close vicinity.

NOTE:

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