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    dsa99's Avatar
    dsa99 Posts: 6, Reputation: 1
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    #1

    Aug 21, 2007, 10:54 AM
    Honeywell RTH230B thermostat wiring
    I'm trying to install a rth230B, but my wiring connection choices do not match up with my current T-stat wires. Note: My current digital T-stat is a power sharing model (ie. no batteries) and the rth230b uses batteries, so I have that difference right out of the box. I have a single stage gas furnace and single stage condensing unit.

    The choices on the new rth230b are : G,Y,W,Rc,Rh.
    The current wires/connections on my old T-stat are: C (blue), R (red) , W1 (White), Y1 (Yellow) and G (Green).

    There is no specific guidance in the instructions stating where to attach the C (blue wire) and which terminal for the R (red wire), either Rh or Rc.

    As you can tell I'm quite a novice at this, so I'm reluctant to use the trial & error approach.

    Thanks,DA
    acetc's Avatar
    acetc Posts: 1,004, Reputation: 79
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    #2

    Aug 21, 2007, 04:38 PM
    You are smart to be reluctant, but we can solve the problem easily. Tape off the "C" common wire, it will not be used, connect the red wire to the "RC" terminal and put a jumper wire across to the "RH" terminal so that the red wire connects to both "RC & RH" connect the green to "G' and the yellow to "Y" and the white to "W" and you got it, Good luck. Mike
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