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Checking water drain valve > < Air conditioning - engine room

Polo Mk3

Before beginning repair work, perform the following steps:
Before beginning repair work, perform the following steps:
–  Switch off all electrical consumers.
–  Switch off ignition.
–  Pull out ignition key.
   
  Note
Parts marked “*” 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 - Refrigerant hose*
q   From expansion valve to air conditioner compressor.
q   With damper.
2 - Refrigerant line*
3 - Refrigerant hose*
q   From expansion valve to receiver with dryer bag.
4 - Evacuating and charging valve*
q   Releasing refrigerant into the environment is a punishable offence.
5 - Expansion valve*
6 - Dust and pollen filter
q   With active charcoal filter.
q   Removing and installing → Chapter.
7 - Ambient temperature switch -F38-
q   From 10.99 replaced by temperature sender for compressor switch-off -G346-.
q   Switches off air conditioning system magnetic coupling -N25- if the ambient temperature is too low (off at -1° C, on at 7° C).
q   Removing → Chapter.
8 - Water drain valve
q   Checking → Chapter.
9 - Quick release coupling
q   Removing and installing → Chapter.
q   Not present with all types of engines.
10 - Coolant temperature sender -G62-
q   Coolant temperature sender -G62- switches off air conditioning system magnetic coupling -N25- when the coolant temperature is too high (off at 119°, on at 112°).
11 - Radiator fan control unit -J293-
12 - Ambient temperature sensor -G17-
q   from 10.99
q   Function: temperature sensor controls temperature flap and fresh air blower, depending on 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   Removing → Chapter.
13 - Receiver with dryer bag*
q   Functions → Chapter.
14 - High-pressure safety valve*
q   Checking → Chapter.
15 - Refrigerant hose*
q   From air conditioner compressor to condenser.
16 - Air conditioner compressor*
q   Manufacturer: Sanden, designation: SD6-V12
17 - High pressure sender -G65-
q   Removing and installing → Chapter.
q   Torque setting: 8 Nm
q   Renew O-ring (note part number).
q   The high pressure sender -G65- can be removed without extracting the refrigerant from the refrigerant circuit.
Function:
q   The high pressure sensor -G65- supplies information to radiator fan control unit -J293- and engine control unit.
q   Switches radiator fan -V7- to next higher speed when pressure increases in refrigerant circuit.
q   The high pressure sender -G65- cannot be checked via the Climatronic self-diagnosis, but only via the engine control unit self-diagnosis.
q   Check high pressure sender -G65- → Chapter.
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).
18 - Air conditioning system magnetic coupling -N25-
q   Repairing → Chapter.
19 - Condenser*
q   Removing → Chapter.
20 - Damper*
q   In refrigerant hose from expansion valve to air conditioner compressor.

   

Checking water drain valve > < Air conditioning - engine room