Hello all pro here,
I have a heat pump unit and the thermostas came with it does not work any more (I think or could be something wrong with the unit itself), I replaced with new one, and it worked for couple day than cold air did not come out any more, even when I swithed FAN to ON position. I had to turn the unit off for a while then turned it back on and it worked a short time and no cold air again, what could it be wrong?, thanks in advance.
It is HOT where I live, :(.