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    alykgood@'s Avatar
    alykgood@ Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Dec 26, 2009, 08:20 PM
    Honeywell rth221b troubleshooting
    I have 4 wires a red, blue, green and white from my old thermostat. A friend of mine told me to cross up the white and red to temporarily get the heat running. I got the Honeywell RHT221b, but am not certain where the red or the white go? In the old one the White went to R and the red to O. The honeywell doesn't have an O or plain R option.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 26, 2009, 10:09 PM
    What type of a system do you have?
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