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weejumper's avatar
weejumper
Explorer
Jun 02, 2015

Replacing the Old Analog with this Honeywell

I purchased this Honeywell thermostat today and was told it would work on a Dometic Roof Top ducted air conditioner. I have attached the wiring diagram on the old thermostat, pic number 1, and pic of the new one, pic 2 & 3. I will only wire in the high fan speed. Any help would be appreciated. Need help with wiring. Red 7.5 and Gnd giving me a fit.



  • ScottG's avatar
    ScottG
    Nomad
    Jun 02, 2015
    Honestly, that stat isn't much of an upgrade so it may not perform any better than what you had.
  • Chris_Bryant's avatar
    Chris_Bryant
    Explorer II
    Jun 02, 2015
    I'll give it a shot- though that one is a bit odd.
    Red- not used
    Yellow- Y
    White -W
    Blue and Brown- G
    Green - R

    Reasoning- the DuoTherm grounds the relays to activate, plus needs both fan wires grounded for Hi fan.

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