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Repair work on refrigerant circuit which may be performed only in workshops with specially trained mechanics > < Removing and installing footwell and defroster flap control motor V85

Golf Mk4

Climatronic - engine compartment
Climatronic - engine compartment
  Note
Parts marked with an “*” can be repaired only in workshops with suitable equipment and specially trained mechanics because the refrigerant must be evacuated beforehand using, for example, the air conditioning service station -VAS 6007A-.
   
1 - Damper with filling valve, low pressure side*
q   In refrigerant hose from expansion valve to air conditioner compressor.
q   For vehicles with the engine code BDE near the expansion valve.
2 - Refrigerant hose*
q   From expansion valve to air conditioner compressor.
q   With damper.
3 - Refrigerant line*
q   From receiver with dryer bag to expansion valve.
4 - Evacuation and filling valve high pressure side*
q   Releasing refrigerant into the environment is a punishable offence.
5 - Air conditioning system pressure switch -F129- or high pressure sensor -G65-
q   Removing and installing:
q   Torque setting 8 Nm
q   Renew O-ring (note part number).
q   Air conditioning system pressure switch -F129- and high pressure sender -G65- can be removed without having to evacuate refrigerant from refrigerant circuit.
q   The high pressure sensor -G65- cannot be checked via Climatronic self-diagnosis.
q   Checking: vehicle diagnosis, testing and information system -VAS 5051B- in guided fault finding.
q   Check air conditioning system pressure switch -F129- → Chapter.
q   Check high pressure sender -G65- → Chapter.
Function:
q   Switches radiator fan -V7- to next higher speed when pressure increases in refrigerant circuit.
q   Switches off the air conditioner when the pressure is high (for example, insufficient engine cooling).
q   Switches off the air conditioner when the pressure is too low (for example, loss of refrigerant).
q   The high pressure sensor -G65- supplies information to radiator fan control unit -J293- and engine control unit.
6 - Expansion valve*
7 - Dust and pollen filter
q   With activated charcoal filter.
q   Removing and installing → Chapter.
8 - Water drain valve
q   Checking → Chapter.
9 - Heater coolant shut-off valve -N279-
q   Engine code: BAD.
q   Checking: vehicle diagnosis, testing and information system -VAS 5051B- in guided fault finding.
10 - Air conditioning system shut-off thermal switch -F163- through week 17.99
q   Air conditioning system shut-off thermal switch -F163- switches off air conditioning system magnetic coupling -N25- when the coolant temperature is too high (off at 119°, on at 112°).
q   Removing and installing in vehicles with engine code AGZ → Chapter
q   Coolant temperature sender -G62- installed beginning week 18.99.
11 - Radiator fan control unit -J293-
12 - Ambient temperature sensor -G17-
q   Task: the temperature sensor controls the temperature flap and the fresh air blower based on the temperature.
q   Emergency operation during failure:fresh air intake duct temperature sensor -G89- takes over the function. If both sensors are defective, operation continues with an assumed value of +10° C. Air recirculation is not possible. The control and display unit for Climatronic air conditioning system -E87- displays “--”.
q   Checking: vehicle diagnosis, testing and information system -VAS 5051B- in guided fault finding.
13 - Refrigerant hose*
q   From expansion valve to air conditioner compressor.
q   With damper.
14 - Refrigerant hose*
q   From air conditioner compressor to condenser.
15 - Condenser*
16 - High-pressure safety valve*
q   Checking → Chapter.
17 - Air conditioner compressor*
18 - Air conditioning system magnetic coupling -N25-
q   Repairing → Chapter.
19 - Receiver with dryer bag*

   

Repair work on refrigerant circuit which may be performed only in workshops with specially trained mechanics > < Removing and installing footwell and defroster flap control motor V85