Re: Mercedes C class 1993 1800cc heater stuck hot Archived Message
Posted by Shaun Dale on July 3, 2008, 6:28 pm, in reply to "Re: Mercedes C class 1993 1800cc heater stuck hot"
Hi Phil, Have had several different problems on these. The control valves are just solenoids, if there is no control signal to the solenoids (or just unplug them) and they still let hot water through then they can be dismantled and cleaned, basically the plungers stick. I have also had problems with the control panels due to overheating, I have repaired them, sorry I can't remember what parts needed replacing, I have a vague feeling there is a big diode in the 12 V supply that fries. HTH Shaun.
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