Removal and installation of the heater control unit

Vehicles manufactured before 04.1992

1. Remove ground wire from battery.

Attention! At the same time, information in electronic storage devices is erased from memory.

Front block

2. Remove the instrument cluster from the instrument panel.

3. Remove the upper part from the instrument panel.



4. Mark the position of the cables. release clamp (indicated by an arrow) cable sheaths, remove the clips and the temperature control lever cable.

5. Remove the air distributor cable in the same way.

6. On vehicles with air conditioning, disconnect the hoses from the vacuum switch.

7. Unscrew the four screws securing the heater control unit.

8. Install and fix the control panel with screws.

9. Connect the cables in accordance with the markings and fasten with clamps to the heater control panel, install the adjusting clamps and fasten the cable sheaths.

10. Install the instrument cluster on the instrument panel.

Rear block

11. Remove center console.

12. Disconnect control cables and remove control box.

13. Installation is made in sequence, return to removal.

Vehicles manufactured since 04.1992

Heater control unit

1. Remove ground wire from battery.

Attention! At the same time, information in electronic storage devices is erased from memory.

2. Unscrew the two screws and remove the trim from the instrument panel.

3. Remove the rotary knobs of the heater control unit by simply pulling them towards you.

4. Unscrew the 4 screws securing the control unit trim, pull the trim a little and disconnect the connectors. Completely remove the control box cover.



5. Unscrew two screws (indicated by arrows) mounting of the control unit. Remove the heater control unit and disconnect the multi-pin connector.

6. Remove the fan switch from the control box.

7. Use a screwdriver to bend the retaining tabs and remove the cover from the main board.

8. Cut the cable clamps. Release from the guide toothed belt and pull out the cables.

9. Install the cables in the main board and connect to the toothed guide tape. Fasten the cables with new clamps.

10. Install the cover on the main board and squeeze the retaining tabs.

11. Install the blower switch in the heater control unit.

12. Connect the multi-pin connector to the heater control unit.


13. Install and fasten the heater control unit with screws.

14. Connect the multi-pin connector to the trim of the heater control unit and screw on the trim.

15. Install rotary knobs on the heater control unit.

16. Install the trim on the instrument panel and secure it with screws.

17. Connect ground wire to battery.