6 discussions on HomeOwnersHub about the Honeywell RTH7500: what owners asked, what went wrong, and what fixed it.
I recently purchased a Honeywell RTH7500 to replace a Trane Baystat240.I have a multistage electric heatpump and A/C. I was about to call mylocal HVAC contractor to install it, when I had the idea of at leastreading the manual first and...
Hi, I called Honeywell to find out which thermostat I need for my heatpumpsystem. Itold them the current wiring on the old thermostat and wasadvised to buy theRTH7500 or RTH7400.Here is how I was told to wire it:Old to NewY1 to YR to RG to...
Hi,I installed this t-stat in February 2005 and it worked fine through theheating system with my carrier heat pump. The heat pump says it wasmanufactured in 9/86... So it was the original one put into the home. Itried to get A/C this...
Happy New Year!I'd like to ask for help with my Honewell RTH7500 thermostat.I am replacing a White-Rogers 1F35-910 thermostat in my house. TheRTH7500 was suggested by Honeywell support. I have a gas boiler systemfor heat.The wiring on the...
Hello, We have had a Carrier Heat Pump with a Honeywell thermostate forover 5 years without a problem. Not sure what model number the T-stat is. When I came home Friday, it said te indoor temp was 92, yet it was verycold, mid 70's...
I am trying to install 2 Honeywell RTH7500 programmable thermostats tocontrol 2 (out of three) separate zones (1st floor & 2nd floor) withinmy house.The old thermostat (TrolAtemp) on the 1st floor had 6 wires, R, W, Y,G, B and O (tan line)....