Climate Control 1983 300d - PeachParts Mercedes-Benz Forum

jsrmb · #1 04-06-2001, 11:21 AM

I am having a problem with my car's climate control:
If the heat is turned off while the car is running it can not be turned back on. To turn the heat back on I must shut down the engine and then restart (turn the key off and back on)
Any help in isolating the problem would be of great help
Thanks

CloudNine · #2 04-06-2001, 11:26 AM

Sounds like a classic monovalve problem, if your car has one. Search for threads with the words "monovalve" or "vacuum and heater", this may help.

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