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

    Feb 15, 2009, 09:11 AM
    Missing B and O wires for connectint to a Hunter 40170 thermostat
    I am replacing a white rodgers thermostat with a Hunter 40170. The wires have all been marked but the old thermostat does not have wire connections for the B and O terminals. These are for heat and cooling reversing valves. Where do I go from here. Will it work without wires in these terminals? I believe the wire bundle has two unused wires but I have no idea what they are for.
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Feb 15, 2009, 03:44 PM
    The wires have all been marked but the old thermostat does not have wire connections for the B and O terminals.

    If the old thermostat did not use B and O then why do you need to use them now? Are you replacing your heating system?

    Post system info. Type, brand, and complete exact model numbers.
    wmproop's Avatar
    wmproop Posts: 3,749, Reputation: 91
    Ultra Member
    		  
    #3

    Feb 16, 2009, 07:02 PM
    Be sure to remember how your white rogers was wired,,
    Cause with the hunter tstat you`ll be replacing it a very few months
    If it even works at all
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