[diesel_mercedes] Re: Full heat on all settings except max cold - 84 300D

 

I'd replace the entire Monovalve first , the coil occasionally poops out along with the rubber diaphragm .

-Nate
Jim wrote:
>
> OK my 84 300D is putting out full heat constantly on all settings except max cold. It is drawing air past the sensor. I put a hair dryer on the sensor to heat it up, no change. I guess it could be the sensor if I was lucky. Anyone know the next culprit? I'm guessing it would be the part referred to as the temp regulator unit, or amp, or whatever, the $125 silver box under the dash? Anyone had experience with this? I guess it could also be the pushbutton box with the temp wheel. I don't know how all this stuff works together. Thanks for your help.
>
> Jim
>

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