Seems that the Honeywell RTH230B thermostat is very popular with the Do It Yourself crowd, judging by the many questions about how to connect this thermostat. Honeywell, while making a very good product, seems to not want to post the wiring diagram at their web site, and does not even recognize...

I have a Janitrol A/C and heat pump system. I replaced the thermostat with a Lux T9000LC The A/C works fine, but the heater does not. I have it wired as follows: G - Green Y - Yellow W - White RH - Pink B -

Removed my old Honeywell T87 thermostat for a new digital one. Now my wife can't program the digital. Neither can I. So to avoid domestic untranquility, I am putting the old one back on. Trouble is, I forgot to note the wiring hookup. I have four wires, Red, Blue, Green, and White. Can someone...

I am changing a Janitrol mechanical thermostat to a Rite Temp 8085. And the heat Pump is a Goodman. The wires on my old thermostat are labeled G, Y, E,R,O,W,and C There is no E on the new thermostat. I have hooked the others to the corresponding letters on the new thermostat and left the brown E...

I purchased a Honeywell Vision 5-1-1 Day programmable thermostat to replace a Lennox thermostat (51H4301). This is an all electric heat pump type unit (Lennox HP 21-511-5P). According to the Honeywell manual, if the old thermostat has wires W1, Y1 and W2, some system modification is required. Call...