Assembly overview - heater and air conditioning unit, Climatronic

Note There are different designs and makes of heater and air conditioning unit. The individual components of the various heaters and air conditioning units are similar but not identical. The combined fitting of different makes of component is therefore not permissible → Electronic Parts Catalogue. The following illustrations show a “Valeo” heater/air conditioning unit, distinguishing features with respect to other makes → Chapter. Note The illustration shows a left-hand drive vehicle.

Assembly overview - heater and air conditioning unit, flap control (left side)

1 -	Actuating lever

For actuation of defroster and air distributor flap

2 -	Air distribution flap control motor

Checking: Use vehicle diagnostic tester in “Guided fault finding” mode and → Current flow diagrams, Electrical fault finding and Fitting locations

Heater and air conditioning system with electric/manual controls:

Air distribution flap control motor -V428- with potentiometer for air distribution flap control motor -G645-

Removing and installing → Chapter.

Climatronic:

Front air distribution flap control motor -V426- with potentiometer for front air distribution flap control motor -G642-

Removing and installing → Chapter.

3 -

Bolt

Qty. 2.

1 N·m

4 -

Bolt

Qty. 3.

1 N·m

5 -

Bolt

Qty. 2.

1 N·m

6 -	Temperature flap control motor

Checking: Use vehicle diagnostic tester in “Guided fault finding” mode and → Current flow diagrams, Electrical fault finding and Fitting locations

Heater and air conditioning system with electric/manual controls:

Temperature flap control motor -V68- with potentiometer for temperature flap control motor -G92-

Removing and installing → Chapter.

Climatronic:

Left temperature flap control motor -V158- with potentiometer for left temperature flap control motor -G220-

Removing and installing → Chapter.

7 -	Actuating lever

For warm air flap

8 -	Heater and air conditioning unit

Many components of the heater and heater/air conditioning unit are identical

Different versions → Chapter.

The combined fitting of different makes of component is not permissible

The following illustrations show the heater unit from “Valeo”.

Removing and installing → Chapter.

9 -	Defroster and air distribution flap actuation unit

Fitted only on vehicles with heater or air conditioning system with electric/manual controls.

Removing and installing → Chapter.

Note The illustration shows a left-hand drive vehicle.

Assembly overview - heater and air conditioning unit, flap control (right side)

1 -	Heater and air conditioning unit

Removing and installing → Chapter.

2 -	Actuating lever

For defroster flap

3 -

Bolt

Qty. 2.

1 N·m

4 -	Defroster flap control motor -V107-

With potentiometer for defroster flap control motor -G135-.

Only with Climatronic.

Checking: Use vehicle diagnostic tester in “Guided fault finding” mode and → Current flow diagrams, Electrical fault finding and Fitting locations

Removing and installing → Chapter.

5 -	Right temperature flap control motor -V159-

With potentiometer for right temperature flap control motor -G221-

Only with Climatronic.

Checking: Use vehicle diagnostic tester in “Guided fault finding” mode and → Current flow diagrams, Electrical fault finding and Fitting locations

Removing and installing → Chapter.

6 -

Bolt

Qty. 2.

1 N·m

7 -	Actuating lever

For warm air flap

Assembly overview - heater and air conditioning unit, heat exchanger, auxiliary air heater element

The illustration shows a Valeo heater unit in a left-hand drive vehicle.

1 -

Bolt

6 N·m

2 -	Coolant pipe with heat exchanger

Different versions. Refer to → Electronic Parts Catalogue.

Coolant supply from the engine

Removing and installing → Chapter.

3 -

Clip

4 -	Coolant pipe with heat exchanger

Different versions. Refer to → Electronic Parts Catalogue.

Coolant return to the engine

Removing and installing → Chapter.

5 -	Sealing ring

Different versions. Refer to → Electronic Parts Catalogue.

Renew.

6 -

Cover

For heat exchanger.

7 -

Bolt

2 N·m

8 -	Foam spacer

For sealing and insulation.

Note fitting position.

9 -

Bracket

For coolant pipes.

10 -

Foam

For insulation

Note fitting position.

11 -	Heater and air conditioning unit

On vehicles without auxiliary air heater element -Z35- with auxiliary air heater control unit -J604- the opening for the auxiliary air heater element -Z35- is closed.

Removing and installing → Chapter.

Dismantling and assembling → Chapter.

12 -	Heat exchanger

Different versions. Refer to → Electronic Parts Catalogue.

Removing and installing → Chapter.

13 -	Auxiliary air heater element -Z35- with auxiliary air heater control unit -J604-

Checking activation → Chapter.

Removing and installing → Chapter.

14 -

Bolt

Qty. 2.

2 N·m

15 -	Electrical wiring

For auxiliary air heater element -Z35- with auxiliary air heater control unit -J604-.

16 -	Earth cable

For auxiliary heater.

Nut 9 ± 1 N·m

17 -

Bolt

Qty. 3.

2 N·m

18 -	Screw-type clip

19 -	Sealing ring

Different versions. Refer to → Electronic Parts Catalogue.