Repairing components for controlling and regulating the air conditioner — VW

Notes:

*Only on vehicles with 2.1 l petrol engines or turbocharged diesel engines
**The items where the number is underlined can only be replaced by specially equipped V.A.G workshops.

E33 - Temperature switch for evaporator
Checking => Fig.
1
Installing sensor for temperature switch => Fig.
2

E35 - Switch for air conditioner
Renewing => Fig.
3
Internal resistance: 10 kω max.

E110 - Switch for evaporator blower
Replacing => Fig.
4

F18 - Radiator fan thermoswitch
Installation position => Fig.
5
Tightening torque: 15 Nm

F 23 High pressure switch**
Note on installation => Fig.
6
Function => Fig.
6

F38 - Ambient temperature switch
Switching temperatures => Fig.
7
Function => Fig.
7

F73 - Low pressure switch for refrigerant circuit**
Notes on installation => Fig.
8
Function => Fig.
8

J32 - Air conditioner relay
Installation position => Fig.
9

J44- Magnetic coupling relay
Installation position => Fig.
9

J101 - Radiator fan 2nd stage relay
Installation position => Fig.
10

J135 - Relay for coolant fan 3rd stage*
Installation position => Fig.
11

J157 - Evaporator blower relay
Installation position => Fig.
9

N25 - Magnetic coupling for air conditioner**
Replacing => Fig.
12

N39 - Radiator fan series resistor*
Installation position => Fig.
13

N81 - Series resistor for evaporator blower
Removing: Dismantling and assembling evaporator housing => Page
87-38

S - Fuse for coolant fan* (50 A)
Installation position => Fig.
11

SO - Fuse in auxiliary fusebox (50 A)
Installation position => Fig.
9

S1 - First fuse in fuse box (30 A)
Installation position => Fig.
10

S12 - Twelfth fuse in fuse box (15 A)
Installation position => Fig.
10

S51 - Fuse for evaporator blower (20 A)
Installation position => Fig.
14

V7 - Radiator fan
V20 - Evaporator blower
Removing: Dismantling and assembling evaporator housing => Page
87-38

Fig.1
Checking temperature switch for evaporator

Switching temperatures:

Cold:

On + 5°C
Off 0°C...+ 4° C

Warm:

On + 21°C
Off 15°C...+ 21° C

Fig.2
Installing sensor for temperature switch

Insertion depth:

50 mm, through drill hole in housing for upper section of evaporator.

Fig.3
Replacing switch for air conditioner (E35)

Remove windscreen air duct.

Fig.4
Replacing switch for evaporator blower (E110)

Remove windscreen air duct.

Fig.5
Radiator fan thermoswitch (F18)

Fig.6
High pressure switch (F23)

Note on installation:

Can only be replaced by a specially equipped V.A.G workshop.

Function:

When pressure rises, it switches the coolant fan to a higher speed.

Fig.7
Ambient temperature switch (F38)

Switching temperatures:

Opens + 2°C
Closes + 10°C

Function:

It switches off the magnetic coupling at low ambient temperatures.

Fig.8
Low pressure switch for refrigerant circuit (F73)

Note on installation:

Can only be replaced by a specially equipped V.A.G workshop.

Function:

It disconnects the magnetic coupling if the air conditioner system is insufficiently charged.

Fig.9
Air conditioner relay (J32)

Magnetic coupling relay (J44)

Evaporator blower relay (J157)

Fuse in auxiliary fuse box - SO (50 A)

Fig.10
Radiator fan 2nd stage relay (J101)

S1 - 30 amps
S12 - 15 amps

Fig.11
Relay for coolant fan 3rd stage (J135)

Fuse for coolant fan - S (50 A)

Behind the fresh air outlet, left.

Fig.12
Replacing magnetic coupling for air conditioner (N25)

Can only be replaced by a specially equipped V.A.G workshop.

First take apart electrical plug-and-socket connection -arrow- so that the system is not damaged.

Fig.13
Radiator fan series resistor (N39)

Behind the left headlight.

Fig.14
Fuse for evaporator blower (S51)

20 amps