Ok, Guys I have worked now for two days (nights) trying to make this stat work correctly.
My current symptoms are:
All works fine except the A/C fan comes on when the heat comes on. (not the a/c compressor, just the fan)
To get this far, I set the gas/electric switch to "electric". (moving this switch to the "gas" selection, the A/C fan only runs when fan mode is selected to "on". The a/c fan then also runs when the heat come on. NO fan period when set to auto.)
The wiring is set as follows:
A/c side Stat side
White to white
Yellow to yellow
Green to green
Red to R/Rh (with jumper on)
blue not used
grey not used
Blue, when touched to red "sparks"
Grey, when touched to red causes a/c fan to run (not sure if low or high)
Green when touched to red causes a/c fan to run (not sure if low or high)
connecting the green and grey together and installed in the G terminal does not seem to make the fan sound any different (unknown hi or low)
Like I said, all is working except that the a/c fan runs when the heat is turned on.
I have an Atwood 8535IVDCLP furnace
I called Honeywell support and after about 20 minutes, the guy told me this stat will not work on 12 volt systems. He left me hanging 2 time to go back and verify his statement.
He also told me I would have to bring in an a/c professional to resolve my digital thermostat needs.
I went through this whole same scenario last year with a Hunter stat in my old TT. We now have a new to us Fleetwood Pride 5th wheel and Atwood furnace and Honeywell stat. (Still love our Forest River Friends!!!)
Can anyone help me resolve this issue?
(I am using this thread because I followed the wiring from TRrguy to get this far)