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Volkswagen Golf Service & Repair Manual: Retrofitting refrigerant circuit from R12 refrigerant to R134a refrigerant

Volkswagen Golf Service & Repair Manual / Air conditioning system with refrigerant R134a / Refrigerant circuit / Retrofitting refrigerant circuit from R12 refrigerant to R134a refrigerant

Chlorofluorocarbon (CFC) is no longer used as a refrigerant in the automotive sector.
R12Converting refrigerant circuits from refrigerant R12 to refrigerant R134a and repairing the converted circuits.
→ Repair manual for air conditioning systems with refrigerant R12 parts 2 and 3. This workshop manual is only available as a hard copy.
   
Important repair notes on air conditioning
Air conditioning systems designed for refrigerant R12 must not be charged with refrigerant R134a until specific conversion measures have been performed →& ...

Working with the air conditioner service station
  Caution If there is evidence to suggest that chemical substances have been added in the vehicle to seal leaks, ...

Other materials:

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). 2. Switches the air conditioning system off in the event of excess ...

Notes concerning odours in air conditioned vehicles
If the evaporator emits unpleasant odours, clean the evaporator. Volkswagen has tested and approved the ultrasound A/C cleaner -VAS 6189A- as well as the suction feed spray-gun -V.A.G 1538- with the appropriate spray probe. ...

Renewing Lambda probe
  Note Do not repair Lambda probe wires, since this can result in malfunctions. If necessary, replace attachment parts, cable ties or marking rings to match the uniform probe to the defective probe as specified. ...

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