VW Golf manuals

Volkswagen Golf Service & Repair Manual: Connections to valves for switches in the refrigerant circuit

  WARNING
Danger of freezing injuries.
If refrigerant circuit has not been evacuated, refrigerant will escape.
The refrigerant must be extracted before the valve -C- is removed. If the refrigerant circuit is not opened within 10 minutes after it has been evacuated, pressure may develop in coolant circuit due to re-evaporation. Extract refrigerant again.
The switches on the high-pressure and low-pressure sides have different threads.
   
Use only valves and O-rings that are resistant to refrigerant R134a and its associated refrigerant oils.
A -  Connection (soldered in)
B -  O-ring
C -  Valve (with O-ring)
 

Connections to valves for switches in the refrigerant circuit

Low-pressure switch for air conditioning system -F73
Function: In the event of pressure loss in the refrigerant circuit, switches the air conditioner compressor off (at approx. 2 bar). ...

Air conditioning system pressure switch -F129
This pressure switch has 3 functions: 1. Switches radiator fan to next higher speed when pressure increases in refrigerant circuit (approx. 16 bar). ...

Other materials:

Test prerequisites
Radiator and condenser must be clean (clean them if necessary). The heat insulation on expansion valve is OK and properly installed. See vehicle-specific repair manual → Rep. gr.87. The poly V ...

Removing and installing TV tuner, Golf
Special tools and workshop equipment required     Protective cap for wiring harness connector -VAS 6223/9- If the control unit is replaced, select the Replace function of the resp ...

Removing broken rear window
–  Protect body and interior from glass splinters. –  Remove pieces of glass up to adhesive sealing material. –  Pull off connections for rear window heating and aerial.     ...

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