Carrier Digital Heat Pump T Stat - Changes Settings by itself, I set it @ 75 and a few days later we feel warm and its set to 77 or 78. We are the only 2 in the house. the system has been installed for 6 years. We have just had a new Ge fan motor and controller installed, A 44AE133 1/2 hp. The guy said we had a 3/4 hp unit and changed it to a 1/2 hp unit and adjusted the jumper board by the 24 VAC transformer. The 3/4 hp was noisy the 1/2 hp is much quieter. Now the thermostat changes by itself. I ordered a new thermostat and will try it, i opened it up and tightened the connections, none were loose. There is no battery in the T stat. Any seen this before? Jc

I have a natural gas furnace that has electric heat primary. I noticed a few weeks back that when the electric heat is supposed to be on the inside fan is moving air, but only cold air is coming out. When I go outside and hit the red reset button on unit it turns on and electric heat starts coming through to the house. I may have had this problem for a while, b/c once it gets cold enough in the house the gas furnace kicks on and keeps things liveable. I have had to reset the outside unit 3 times in the past month. It seems to run for a few days on its own and then will require resets. I'm curious if anyone knows if this is more likely a setup issue or actual mechanical/electrical fault. When the unit is running it seems to work fine. Same with the 2nd stage gas heat, when it kicks on it provides great heat. I'm curious if my outside switch which designates "Gas Heat" when it gets below an adjustable temperature could also be the cause? Thanks in advance for any advice.