Not really seeing anything out there that resembles my issue. Only thing that looked intersting were the mention of 2 sensors. One is on top of the dash, but doesn't that only come into play if I were using the AUTO temp feature? Also, there was talk of a sensor behind the glovebox. How often do these fail?

Also, I assume the monovalve would open or close depending on the setting. If on full cold, it is closed, if on full heat, it is open. Somewhere in the middle if the wheel is set between MIN and MAX. Could the valve be the problem if I get no variation of temp between the MIN and MAX setting or is it likely electrical or ?????