Auxiliary Cabin Heater Control Valve: Service and Repair

64 12 577 - Replacing changeover valve for independent/auxiliary heater





Warning!
Danger of scalding!
Only perform the following tasks on an engine that has cooled down.
Follow instructions for working on cooling system 17 00 ... Instructions For Working on Cooling System.





Note:
Disconnect coolant hoses from changeover valve for independent/auxiliary heater.





Necessary preliminary tasks:
- Remove front left wheel arch trim Service and Repair





Important!
Risk of damage!
Observe marked coolant flow direction.

Disconnect plug connection (1).

Note:
Mark position of coolant hoses prior to removal.

Release spring clamps (2) and detach coolant hoses.

Unscrew nuts (3).
Remove changeover valve for independent/auxiliary heater (4) in direction of arrow.





After installation:
Top up coolant and vent cooling system Component Tests and General Diagnostics.