My furnace will come on with heat SOMETIMES and sometimes it WILL NOT? If I turn thermostat Down and then Up... it come on. Works for a few hours and then may or may not come back on? This is Thermostate problem or Furnace problem? Anything I can check? Thanks,

I have a 2 story house and about 20 years old. I recently bought this house. I do not know so much about to maintain properly. I have a delime that, when I put the thermostat to 70, the downstairs always get cold but the upstairs get hot. As long as the hot air comes from room vent, it feels...

I turned my air on to cool the house down this evening and the thermostat is not on and therefore I can't get the air (nor the heat) on. What do I do?

My T87F has two wires Red and White. No code indicating how to connect to the new digital on.

Hi Everyone, I just bought a new house and one of the first things I did was to change the old thermostat for a Honeywell RTH7500. My heat pump is a Goodman cple30-1. My question is 2 fold, what system type should I choose as far as programming my thermostat? I currently have it set to...