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shadetree77 08-23-2011 11:26 PM

temp dial?
 
hi all,


when i move the temp dial from the locked "MIN" cool setting to just below the "MIN" setting my HVAC goes straight to full Heat...could that be a vacuum pod problem, or a problem with the push-button unit?

thanks,

1983 300SD

Jeremy5848 08-24-2011 04:08 PM

Check the wiring to the cabin temperature sensor in the center of the dash (or is it overhead in the SD?). If a wire breaks, the CCU gets no temperature signal and defaults to full heat once you are out of the MIN click-stop.

shadetree77 08-24-2011 11:14 PM

ahhh..thanks jeremy..when i got the car the cabin sensor was missing and i replaced it with a junkyard one....guess it's probably shot or maybe the wiring...i'll check it out this weekend and report back....thanks a million


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