I am attempting to replace our Weathertron thermostat with a Honeywell RTH3100C. We have a Trane heatpump system. I am having trouble with the wiring. My wires don't match the 'less common wire designations' in the manual. I have the following wires on the Weathertron: R-red T-brown O-orange...

I am replacing my old Honeywell mecury thermostat with a programmable Honeywell RTH230B. I have two unmarked wires (red & white) connected to the old thermostat. I know, given my furnace, that I need to use connections "RH" and "W" on my new thermostat. What wire, Red/White goes to what...

What is the wiring layout from the Janitrol hpt 18-60 to the Honeywell RTH230B?

I am replacing an old Fedders thermostat with a new Honeywell. The new thermostat ask to identify wires for Rh Rc W Y & G My old Fedders has V H C & F Can someone tell me wich equates to what. Thanks in advance. Amador

Hi! I've just removed my Honeywell Thermostat and am trying to replace it with a Noma programmable tstat... but am having problems with the wiring. There are 5 wires coming out of the wall - Green, Black, Orange, Red and White, and only 4 posts on the Noma tstat (Green, Red, Yellow and White). ...