83' 300D no heat? - PeachParts Mercedes-Benz Forum

miketaco · #1 11-06-2006, 01:43 PM

I have no heat? Where do I start? Are there any good heaters available?

MattBelliveau · #2 11-06-2006, 01:46 PM

Give more info. Fan blows, but not hot air? No Fan, hot air (put your hand over the defrost)? No Fan, No air?

miketaco · #3 11-06-2006, 01:49 PM

Matt,

After you drive the car for an hour you get a faint amont of heat. No fan, no nothing.

MattBelliveau · #4 11-06-2006, 02:00 PM

Mike, do a search on "mono valve" to find it's location. Unplug the electrical connection, then try for heat. If this is your problem, you should get full heat, but you will have no control over temperature.

MattBelliveau · #5 11-06-2006, 02:02 PM

Also sounds like it could be a problem with you climate control. Took me a min before I found the sweet spot on mine. It will only work when the temp is set to the lowest. Now that I reviewed your last post, I'm betting this is vacuum related, along with the shut off problem. Prepare for LOTS of reading.