1983 300D Turbodiesel heater on constantly - PeachParts Mercedes-Benz Forum

kevin.hemstreet · #1 04-05-2005, 10:46 AM

The weather here in Southern Calif. is starting to turn warm so this heater problem will soon turn into a huge annoyance. It doesn't matter where the climate control temperature dial is turned to, the air coming out of the vents is always hot, and I mean hot! What can I do fix my beloved BEAST?

danwatt · #2 04-05-2005, 10:48 AM

Does the compressor turn on? Does the heater turn off when you switch it off?

If it doesn't turn off and the compressor doesn't turn on, it could be some bad contacts or switches in your control panel.

Wes Bender · #3 04-05-2005, 07:02 PM

First thing I would check is the monovalve. Might be stuck open. Easy fix.

Wes

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