volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

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Repair work on refrigerant circuit which may be performed only in appropriate workshops by specially trained mechanics for vehic > < Dismantling and assembling evaporator housing

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.
Before dismantling, heater and air conditioner unit must be removed.
–  Extract refrigerant, e.g. with air conditioning service station -VAS 6007A-.
  Note
Releasing refrigerant into the environment is a punishable offence.
  WARNING
Danger of scalding injuries.
The cooling system is pressurised. When the engine is warm, the coolant temperature may be above 100° C.
If necessary, release pressure before carrying out repairs.
–  Drain the coolant → Rep. Gr.19.
–  Remove dash panel → Rep. Gr.70.
–  Remove heater and air conditioner unit.
   
  Note
t  Safety measures when working on an evacuated refrigerant circuit → Chapter.
t  The previously used service stations can still be used ⇒ Volkswagen Workshop Equipment catalogue.
t  To prevent the ingress of moisture, all components of the refrigerant circuit which have been opened must be sealed with suitable plugs.
t  Underlined components can be renewed only after evaporator with heater has been removed.
1 - Housing, upper part
q   With fresh air and air recirculation flap.
q   Before assembling, coat fitted surfaces with silicone adhesive sealant -D 176 001 A3-.
2 - Fresh air blower series resistor with overheating fuse -N24-
3 - Intake housing
q   With recirculating air flap.
q   Before assembling, coat fitted surfaces with silicone adhesive sealant -D 176 001 A3-.
4 - Funnel
q   To guide sensor tube of evaporator temperature switch -E33-.
5 - Intake ring
6 - Vacuum unit for fresh air and air recirculation flap
q   Ventilated: fresh air operation.
q   Vacuum hose connection diagram → Chapter.
7 - Fresh air blower -V2-
8 - Housing, lower part
q   Before assembling, coat fitted surfaces with silicone adhesive sealant -D 176 001 A3-.
9 - Temperature switch for evaporator -E33-
q   Insertion depth of sensor tube: 330 mm.
q   Task: prevents icing up.
q   Switching temperature: opens at or below -2° C.
10 - Sealing cord
q   Watertight.
11 - Clip
12 - Air distribution housing
q   Flaps cannot be renewed.
13 - Heat exchanger
q   After removal, completely renew coolant.
14 - Evaporator
q   With funnel to guide sensor tube of evaporator temperature switch -E33-.
15 - Seal
q   Watertight.

   

Repair work on refrigerant circuit which may be performed only in appropriate workshops by specially trained mechanics for vehic > < Dismantling and assembling evaporator housing