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    jcricket1013's Avatar
    jcricket1013 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Oct 21, 2008, 09:53 PM
    My current thermostat is only controlled by 2 wires.
    I'm trying to upgrade my current thermostat to a programmable one but there are only 2 wires controlling the one mounted on the wall now and I can't seem to find a wirng solution for the new thermostat (Honeywell RTH221B series) to work.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 22, 2008, 06:20 AM
    Is your system heat only?

    What is the brand and model number of the furnace?

    Is this in a mobile home?
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