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I purchased a new Honeywell RTH8500 thermostat in the summer, and did the installation myself, but am now having trouble with the heat not coming on (AC was working fine in the summertime). I think there is a problem with the wiring, as I tried hooking back up my old thermostat and the heat came...
I have been trying to connect a new honeywell rth8500 to a Trane unit (believe it is a heat pump). The Trane unit is currently hooked to a Trane thermostat with only 4 wires. They are set as follows Black - Zone Red - Common Blue - Cool setpoint Green - Fan sw The old Trane thermostat...
Please help. I want to replace an old Honeywell CT3600 thermostat with a new touchscreen RTH8500 on a gas hot air furnace w/AC. I think my confusion is what to do about the O and B wires (changeover HEAT and changeover COOL, as I understand it). Here is manual for new RTH8500: ...
Hello: I have a Carrier. My system is a heat pump. In the paper it say it use two stage thermostat. Does this mean that my heat pump unit is a two stage heat pump? I called Honeywell and the told me to select the unit as a " multistage heat pump with backup or external electric heater. I...
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