The dealer told me that my intermittently working thermostate gague was a result (9 times out of 10) of a bad multi function switch. I think thats what its called. Where is that located and is it such a switch one can clean its contacts to see if that works? FWIW, at this time, the thermostate works 95% of the time, it's not very often it sits on cold. TIA, Scott 89 200tqw