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    rhero163's Avatar
    rhero163 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 23, 2007, 02:54 PM
    Replacing Honeywell 890121 with RTH 230B
    5 wires come out of the wall. One (the yellow) was tied off and not connected to the 890121. The blue wire was connected to C, the green to G, the W to White and the red to Y.

    The RTH230B has RH, RC,W, Y and G. connection positions. What wires go where?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 23, 2007, 05:03 PM
    Can not locate this part number you provided. (890121)

    Please list the brand name and correct part number so I can look this up.
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