Clk 230 heater permanently hot

[steam_biker]

My 2001 CLK 230 heater will not turn cold when the controls are turned to blue. I can hear the valve clicking when I take off the wiring connector. I think the water valve is the problem,has anyone else had this problem? I wish I had never sold my old C180!

 

[NW_Merc]

You might need to clean or replace your duo valve

 

[fuzzer]

hope this helps..

Howto: Duovalve maintainance - Mercedes-Benz Owners' Forums