|
A quick fix I did to get the heat to turn off was to unplug the auxilliary coolant pump and run a ground wire from the heater valve to the negative battery terminal to keep it closed. This is assuming that your heater valve is good. It needs ground to stay closed. The default position is open. Got another pushbutton control unit and problem solved.
__________________
1992 400E current
1988 300E sold
1973 280C totalled
1973 280SEL never got it running
1971 250C my first love but rusted out
|