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    johnnykunkel's Avatar
    johnnykunkel Posts: 8, Reputation: 1
    New Member
    		  
    #1

    Oct 5, 2008, 07:14 PM
    Honeywell Thermostat Install
    After an answer on this site I purchased a new thermostat today capable of central heat/cool and also for a heat pump. It is the Honeywell RTH6400. I currently have a White Rodgers (9510E7) rectangular thermostat. I am still having problems figuring which wires go where.

    Currently there are 8 wires coming out of the wall
    Blue- not connected to anything
    Black- not connected to anything
    Red- R
    Brown- C
    Yellow- Y
    White- W2
    Green-G
    Pink- O

    The new thermostat only has room for 5 wires (6 counting the "NOT USED" outlet). The outlets are:
    G
    W O/B
    NOT USED
    Y
    R
    Rc
    *Jumper wire between Rh and Rc.

    Some are obvious:
    G-G
    Y-Y
    R-R
    Rc-None
    The instruction manual says not to connect C, just wrap with electric tape.

    But I am left with O and W2. The instructions say to connect O to the W O/B outlet. If this is the case, then where do I connect the W2 wire? And if I were to connect eh W2 wire to the W O/B, then where do I connect the O wire.

    Please help! Thanks in advance.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 5, 2008, 08:25 PM
    See your other post
    MarkwithaK's Avatar
    MarkwithaK Posts: 955, Reputation: 107
    Senior Member
    		  
    #3

    Oct 5, 2008, 08:26 PM

    I thought this looked familiar HAHA!
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Oct 5, 2008, 08:54 PM
    Yep
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