Valeo Thermo AC 070, Workshop Manual

803

Thermo AC/DC

8 Repairs

8.3

Hood removal/installation

Removing the hood provides access to the following com-
ponents for maintenance, inspection and repair purposes:
–

Small distribution board (load contactor AC/DC)

–

Heating cartridges

–

HVIL contact

Removal
1. Establish voltage-free state of the heater and secure 

it for duration of the work (

Observe

1.6.3

!

).

2. Loosen screws (2, 

Fig. 803, Sheet 1

).

NOTE:

The screws remain in the hood.

3. Remove hood (1) with stabilizer (3) from heater.

Installation

1. Place stabilizer (3, 

Fig. 803, Sheet 1

) onto the small 

distribution board (16).

2. Place hood (1) in assembly position, turn in the 

screws (2) and tighten them.

3. Restore power supply.
4. Perform functional test.

8.4

Housing removal/installation (incl. 
cable connections)

Removal

1. Disconnect all cables from the vehicle electrical sys-

tem to the heater.

2. Remove hood (see 

8.3

).

3. Disconnect cables connected to the small distribution 

board (16, 

Fig. 803, Sheet 1

) by loosening the appro-

priate connections.

NOTE:

For connections to be disconnected, refer to wiring 
diagrams in Chapter 

6

, 

Fig. 601

 thru 

Fig. 607

 depending 

on the heater version.
Compare the heater ident. number under the wiring dia-
gram with that on the model plate of your heater.

4. Remove the cable ties that bundle the single cables.
5. Disconnect temperature guards plug (8, 

Fig. 803, 

Sheet 2

) from connection piece (13, 

Fig. 803, Sheet 

1

).

6. Loosen grounding screw (15) and remove it with 

washer (14) and vehicle grounding cable lug.

7. Remove nuts (6) and washers (7).

NOTE:

During the next step pay attention that the cables are not 
jammed or are still connected. “Danger of damage“.

8. Remove housing from heater.

Installation

1. Position housing over the small distribution board onto 

the heater and then secure it using screws (6, 

Fig. 

803, Sheet 1

) and washers (7).

2. Screw grounding screw (15) with washer (14)  and 

vehicle grounding cable lug into the housing (17) and 
tighten as required.

3. Install connection piece (13) of temperature guards 

onto the housing (17) if necessary.

4. Plug the temperature guards plug (8, 

Fig. 803, Sheet 

2

) into the connection piece (13) of temperature 

guards (note the snap-in noise).

5. Hook-up the supply cables to the corresponding ter-

minals of the small distribution board (16, 

Fig. 803, 

Sheet 1

) and tighten screws as required.

NOTE:

For connections to be established, refer to wiring dia-
grams in Chapter 

6

, 

Fig. 601

 thru 

Fig. 607

 depending on 

the heater version.
Compare the heater ident. number under the wiring dia-
gram with that on the model plate of your heater.

6. Check the wiring again using the wiring diagram (see 

chapter 

6

).

7. Bundle single wires using cable ties.
8. Install hood (see 

8.3

).

9. Connect all supply cables to the vehicle electrical sys-

tem, fix them if required.

8.5

Small distribution board removal/
installation

NOTE:

For loosening and connecting of cables to WAGO® 
terminals a special actuation tool is required. Learn more 
on the manufacturer's website regarding its proper hand-
ling.        

Fig. 802 

1 3

2

Loosen wire: 1 - 2 - 3

Actuation tool

Wire