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    moolaka's Avatar
    moolaka Posts: 1, Reputation: 1
    New Member
    		  
    #1

    May 31, 2009, 08:57 PM
    Moving from honeywell to honeywell visionpro th8110u
    The home I just bought has a natural gas heating, with central AC, and a humidifier. The curent thermostat is a honeywell RTH5100, I just bought a honeywell TH811OU.

    The wiring on the current model is:

    RC jumped to R

    RED - R
    ORANGE - Y
    BLACK - C
    BLUE - W
    GREEN - G
    BROWN - W2

    I tried wiring everything the same into the new one:

    Red - R
    Orange - Y
    Black - C
    Blue - W
    Green - G

    I don't have a W2 aux on the new one... and the only remaining jumpers are S1 and S2 which are for optional outdoor remote sensors.

    THe problem is that when I put the new one on, the air conditioner does not work. I didn't try the heat though. The furnace fan works.

    I had to put the old one back in to get the airconditioner to work again.


    Anyone know how I can install the new thermostat? Thanks
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #2

    Jun 1, 2009, 07:05 PM
    What was wrong with the honeywell RTH5100 ?
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