How do I wire my new honeywell thermostat replacing the old tempstar thermostat?
I am replacing my old thermostat. The old is a TEMPSTAR, the new is a Honeywell model # RTH7500. When I use the directions I end up with one left over wire. We called the Honeywell hotline, the rep. said to wire it like this: red to R, white to O, Yellow to Y, Blue to C, Green to G, Orange to O/B. The problem lies with the white wire to O. There is no O, just O/B. So the white wire is left over. Where do I put this wire. Terminals I have left are: Aux, E, L, and RC. Also, RC and R have a jumper installed.
