heat and air only work when on highest/lowest temp.
to get my heat to work, I have to bump the temp setting all the way up to
high, then I cannot back it down any cooler. It gets stuck on high heat.
Same way with the AC. I have to turn it all the way down to low setting, then
it is stuck on lowest cool. So, basically, I can have it either really cold or
really hot, but no in between. Fan speed works fine and temp comes out of
driver and passenger side evenly. Any suggestions?