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Anti-frost thermostat

Anti-frost thermostat

To remove


1. Remove the glove box.


2. Remove the centre console's side panel.

3. Cars with passenger airbag: Remove the knee member.

4. Remove the air duct on the floor.

5. Remove the air duct to the dashboard's side vent.

6. Cars with automatic transmission:

6.a. Remove the automatic transmission's control module from the bracket on the bulkhead wall and let it hang from its cables.

6.b. Remove the bracket.

7. If necessary, unplug the wiring harness to the dashboard and put it to one side.

8. Turn down the carpet and remove the protective cover.

9. Remove the screws securing the fan control unit (cars with ACC).


10. If necessary, remove the recirculation motor.

11. Remove the end cover on the heating and ventilation unit. The clip can be broken off to make removal easier as the end cover is to be screwed on when refitted. Uncouple the antifrost thermostat electrical connection and remove the clip for the sensor on the low pressure pipe.

12. Use a screwdriver and break the adhesive securing the antifrost thermostat clip to the end cover. Remove the antifrost thermostat from the end cover.


To fit


1. Fit the new antifrost thermostat on the end cover. If necessary, apply butyl tape between the antifrost thermostat and the end cover to prevent it rattling.


2. Connect the antifrost thermostat sensor to the low pressure pipe with the plastic clip.

3. Plug in the connector and replace the end cover on the heating and ventilation unit. Put the ventilation fan on maximum speed and check that condensation is not leaking from the evaporator. Fit a new seal between the end cover and the heating and ventilation unit where necessary.

4. Refit the fan control unit and tighten the screws (cars with ACC).

5. Fit the recirculation motor.

6. Refit the protective cover.


7. Plug in the wiring harness for the dashboard where applicable.

8. Cars with automatic transmission:

8.a. Screw the bracket for the automatic transmission control module to the bulkhead wall.

8.b. Refit the control module.

9. Put the air duct for the dashboard's side vent in place.

10. Put the floor duct in place.

11. Cars with passenger airbag: Refit the knee member and tighten the screws.

12. Refit the side panel on the centre console.

13. Fit the glove box and tighten the screws.