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    baxters801's Avatar
    baxters801 Posts: 1, Reputation: 1
    New Member
     
    #1

    Nov 19, 2008, 11:14 AM
    Honeywell RTH221b
    I am trying to replace a very old thermostat that only has two wires, a red and a white. I am not sure about the wiring to the new Honewell...
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
     
    #2

    Nov 19, 2008, 01:07 PM
    Red wire to RH and the White wire to W

    Owners manual

    http://customer.honeywell.com/techli...69-2060EFS.pdf

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