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    TLW6464's Avatar
    TLW6464 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jul 10, 2008, 02:10 PM
    I have 6 wires with only 5 Terminals?
    I have a new 2007 honeywell RTH230B Programmable Thermostat. I am replacing the old thermostat with this one and I have 6 wires with only 5 terminals. Last winter I installed the thermostat for the heat and I got the furnace working with 5 wires, but I still have one wire left and now that it's summer I want my AC to work, but it's not kicking on. So how do I hook up the wires so the AC and the heat work? I checked my wires and all 6 wires are connected to my unit and this is how it's connected:
    On my unit:

    Red - Rh
    Black - Rc
    White - W1
    Orange - W2
    Yellow - Y
    Green - G


    On my Thermostat Terminals:

    Red - Rh
    Black - Rc
    White - W
    Yellow - Y
    Green - G
    Orange - not connected

    So where does the extra wire go? Because my heat still works, but my AC does not.
    Thanks.
    Trevor
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #2

    Jul 10, 2008, 03:45 PM
    Does the system have two transformers?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Jul 10, 2008, 04:02 PM
    If your first list is from your old thermostat looks like you have a 2 stage heat system.

    Is this a regular system or a heat pump system
    hvacservicetech_07's Avatar
    hvacservicetech_07 Posts: 1,083, Reputation: 75
    Ultra Member
    		  
    #4

    Jul 10, 2008, 09:31 PM
    We need a little more info about your system?
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