VW Golf manuals

Volkswagen Golf Service & Repair Manual: High-pressure safety valve

The high-pressure safety valve is fitted to the air conditioner compressor or the receiver.
The valve opens at a pressure above approx. 38 bar and closes again when the pressure has dropped (approx. 30 bar).
Not all the refrigerant is lost from the system.
Depending on the version, a transparent plastic disc may be fitted, which breaks when the valve opens.
 

High-pressure safety valve

Pipes and hoses in refrigerant circuit
The mixture of refrigerant oil and refrigerant R134a attacks certain metals (e.g. copper) and alloys and dissolves certain hose materials. Therefore, always use genui ...

Design of refrigerant circuit
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Other materials:

Removing and installing toothed belt, engine codes CHPA, CZDA
Special tools and workshop equipment required Torque wrench -VAS 6583- Counterhold -T10172- with adapter -T10172/1- Locking pin -T10340- Counterhold -T10475- Special wrench, 30 mm -T10499- ...

Blowing through refrigerant circuit with compressed air and nitrogen
Use compressed air to force moisture and other contaminants out of the refrigerant circuit and use nitrogen to force moisture out of the refrigerant circuit. The method of blowing through the refrigerant circuit with compressed air ...

Removing and installing temperature sensor -G18- and overheating sensor -G189
Removing     –  Dismantling and assembling auxiliary heater → Chapter. –  Remove bolt -1- (4 Nm) and remove retaining spring -2-. ...

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