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    scouse01's Avatar
    scouse01 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 24, 2011, 09:50 PM
    Honeywell thermostat rth 2300?
    I have an old airco gas furnace, I want to change the thermostat to a RTH 2300, problem is I only have two wires to connect to the thermostat a white and a black and am not sure where to put them? Help
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #2

    Nov 24, 2011, 10:03 PM
    1 to rh
    1 to w
    scouse01's Avatar
    scouse01 Posts: 2, Reputation: 1
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    #3

    Nov 24, 2011, 10:16 PM
    Thanks for getting back to me, I have a choice of o/b, y, Rc, R, G, and W. so the W# is no problem but the second wire to RH is, do I use Rc instead?
    Thanks in advance
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
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    #4

    Nov 25, 2011, 09:37 AM
    Use the R post
    ,, the rc is for ac mode
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #5

    Nov 25, 2011, 06:06 PM
    wmproop is correct, just put one of the wires to w, and the other to r. doesn't matter which goes where. If there is a jumper between rc and r, then you can put one wire to either terminal, but for sake of confusion, just put it to r. Wow, I just found a way to make this confusing. Sorry.
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