Polo Mk3
| Repairing components in refrigerant circuit |
Note| t | The refrigerant must be extracted beforehand, e.g. with the air conditioning service station -VAS 6007A-. |
| t | The previously used service stations can still be used ⇒ Volkswagen Workshop Equipment catalogue. |
| t | Safety measures when working on an evacuated refrigerant circuit → Chapter. |
| t | Only the components marked with an * can be renewed without opening and evacuating the refrigerant circuit. |
| t | To prevent the ingress of moisture, all components of the refrigerant circuit which have been opened must be sealed with suitable plugs. |
| t | The colour coding of O-rings for R134a refrigerant circuits has been discontinued. Coloured and black O-rings are used. |
| t | Moisten threaded connections of refrigerant circuit with polyethylene glycol (PEG) VW part number 294440 before installation. |
| t | Under certain conditions, it is no longer necessary to renew the receiver each time the refrigerant circuit is opened → Rep. Gr.00Technical information “Air conditioning systems - with refrigerant R134a VW” Renewing parts. |
| 1 - | O-ring |
| q | 10.8 mm; 1.8 mm. |
| 2 - | O-ring |
| q | 7.6 mm; 1.8 mm. |
| 3 - | Extraction and charging valve |
| q | High pressure side. |
| q | Releasing refrigerant into the environment is a punishable offence. |
| q | Removing and installing → Chapter. |
| q | Capacities → Chapter. |
| 4 - | Socket head screw |
| q | M6×20 |
| q | With washer 12 mm; 1.6 mm |
| q | 7 Nm. |
| 5 - | Foam hose |
| 6 - | O-ring |
| q | 10.8 mm; 1.8 mm. |
| 7 - | 3/4" thread -17 UNF |
| q | 35 Nm. |
| 8 - | Condenser |
| q | Removing → Chapter. |
| 9 - | 5/8" thread -18 UNF |
| q | 15 Nm. |
| 10 - | O-ring |
| q | 7.6 mm; 1.8 mm. |
| 11 - | Combi bolt |
| q | M10×32 |
| q | 30 Nm. |
| 12 - | High-pressure safety valve |
| q | Checking → Chapter. |
| 13 - | O-rings |
| q | Qty. 2 |
| q | 20.5 mm; 1.8 mm. |
| 14 - | O-ring |
| q | 10.8 mm; 1.8 mm. |
| 15 - | Air conditioning system pressure switch -F129-* |
| Removing and installing: |
| q | Torque setting: 8 Nm |
| q | Renew O-ring (note part number). |
| q | The high pressure sender -F129- can be removed without extracting the refrigerant from the refrigerant circuit. |
| q | Checking air conditioning system pressure switch -F129- → 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). |
| 16 - | Air conditioner compressor |
| q | With air conditioning system magnetic coupling -N25-. |
| 17 - | Air conditioning system magnetic coupling -N25- for air conditioner compressor |
| q | Manufacturer: Sanden |
| Repairs on the magnetic coupling with the air conditioner compressor installed should only be performed only as an exception. |
| q | Repairing magnetic coupling with compressor removed → Chapter. |
| 18 - | 3/4" thread -16 UNF |
| q | 35 Nm. |
| 19 - | O-ring |
| q | 10.8 mm; 1.8 mm. |
| 20 - | Receiver with dryer bag |
| q | Functions → Chapter. |
| 21 - | O-ring |
| q | 7.8 mm; 1.8 mm. |
| 22 - | 5/8" thread -18 UNF |
| q | 15 Nm. |
| 23 - | Extraction and charging valve |
| q | Low pressure side. |
| q | Releasing refrigerant into the environment is a punishable offence. |
| q | Removing and installing → Chapter. |
| q | Capacities → Chapter. |
| 24 - | O-ring |
| q | 16.7 mm; 1.8 mm. |
| 25 - | Expansion valve |
| q | In engine compartment, right. |
| q | Aperture must be sealed against splashed water. |
| q | Removing → Chapter. |
| Functions: |
| t | The expansion valve atomises the in streaming refrigerant and regulates the through flow so that the vapour, depending on heat transport, becomes a gas only upon reaching the outlet of the evaporator. |
| t | The expansion valves for R134a refrigerant circuits are marked with a green sticker. |
| 26 - | O-ring |
| q | 14 mm; 1.8 mm. |
| 27 - | Evaporator |
| q | In passenger compartment. |
| q | Removing → Chapter. |
| q | With funnel -arrow- to guide of sensor tube from evaporator temperature switch -E33-. |
