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

    Nov 11, 2008, 07:09 PM
    Thermostat wiring
    I have a 2 wire set up for my very old thermastat, just bought a new one at rona... one wire is black the other white... where do I install into the new unit... I tried what the book says but the furnace will not turn on, put the old one back on and no problems
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #2

    Nov 11, 2008, 07:30 PM

    Black white wire tells me that you have a 120, or 240v thermostat requirement. Are you sure you didn't buy a 24v themostat. Have to make sure the new thermostat is compatible with your system.

    What type of heat do you have? Electric baseboard, forced air (gas or electric) , hot water(boiler).
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #3

    Nov 11, 2008, 08:23 PM
    Post brand and exact model number of old thermostat.
    Post brand and exact model of new thermostat.
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