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

    Dec 31, 2007, 07:29 PM
    Wiring thermostat
    The old Robertshaw thermostat has a black wire to the G/F screw, a white wire to the W/H/4 screw, a red wire to the B screw, and a jumper between R/RH/5 to Rc. A green wire is not connected. The new Honeywell thermostat needs an R or RH or 4 or V wire. It has screws for G, W O/B, Not used, Y, R, and Rc. Where does the Red wire that goes to the B on the Robertshaw go to on the Honeywell?
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 31, 2007, 10:05 PM
    What is the model number of the new Honeywell thermostat?
    Inept's Avatar
    Inept Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Dec 31, 2007, 11:23 PM
    Rth6300b
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #4

    Dec 31, 2007, 11:41 PM
    Go here page 13

    http://customer.honeywell.com/techli...0s/69-1717.pdf

    Looks like it does not get connected.

    Many times wiring color code is not followed by the original installer. Any time you suspect that it is better to see exactly where each wire connects to you unit so as not to cause a problem.
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