Replacing a thermostat

[NonStopPop]

Howdy...

When I was at work yesterday, my wife called me and said that she walked in the house to find the place stifling and the thermostat acting haywire. She promptly called her father, who talked her through removing it from the wall. Unfortunately, she didn't write down what color wires were attached to what locations...and, now that we're trying to put in a new thermostat, I'm having a devil of a time getting it to work. There are six wires: yellow, green, white, blue, red, and orange. It's electric heat and central air. Logically, I figured that, when putting the wires on, it would go as follows: yellow to Y, green to G, white to W, blue to B, red to R, and orange to O. But when I do that and flip the circuit breakers back on, I get nothing. Can anyone offer any advice...? Thanks in advance...

[Kodiak]

Is it a heat pump or ac only? Make and models of t-stat and units would also help. Usually its hooked like you did but the b could be wrong in some instances. Also this assumes the wires are hooked that way at the unit.

[NonStopPop]

quote:Originally posted by Kodiak

Is it a heat pump or ac only? Make and models of t-stat and units would also help. Usually its hooked like you did but the b could be wrong in some instances. Also this assumes the wires are hooked that way at the unit.

It's a Comfortmaster heat pump. The former thermostat was a Honeywell T674R-1152 with Q674L-1297 base. This new one is a CT70A. Hope this helps. Let me know if you need more info...

[Kodiak]

I could be wrong here, minds kind of in a fog bad weekend. Any way i am not sure if on your unit the reversing valve is energized for heat or cool, i believe cool but not sure. If the blue wire goes to common on the transformer you blew a fuse or transformer on a call for heat. In this case it should be connected to x. If you look at the instructions for your new stat it should say R-power=(Red wire) y1-w1-compressor=(yellow) w2-aux heat=(white) O-r/v cool (orange) Now ive assumed the wires are wired by color at the other end. Last i believe that blue should go to x-common. I must say though this is what i would assume just walking into this situation but would have to verify how there connected at the other end before turning the power back on. Dont know if this makes sense or not.