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    bigtoe2009's Avatar
    bigtoe2009 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Mar 24, 2009, 06:55 PM
    Which wires should I use on my new thermostat?
    I had a Carrier builders non prog thermostat which controls my AC-heat (and air exchange) - The wires hooked in it were white in W, Yellow in Y, Green in G, Red in R and black in C. The orange and blue wires were not used.
    I purchased a Honeywell RTH4300B. I switch off the main breaker and started to hook it up. The Yellow in Y, the White in W, the Green in G, the Red in R. but now , there is no C. There are only O, B and RC. After puttting the power back on, and the 2 AA batteries ( I waited a good 5 minutes between each of the 3 black wire hook ups) , I tried to plug the black wire in all 3 one after the other, but nothing happens... no heat, no cool, no fan.. I am wondering if this thermostat is OK or the right one.
    In some cased it tells me not to hook up the black wire (which used to be on C on my old thermostat.

    Perhaps I need to reset my electric Carrier furnace??

    Help
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Mar 24, 2009, 07:03 PM

    Is your Carrier a electric furnace or a heat pump, this stat won't work on heat pumps.
    bigtoe2009's Avatar
    bigtoe2009 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Mar 24, 2009, 07:14 PM

    Thanks for your help. I have a carrier electric furnace. It is not a heat pump. I also have a Carrier AC and a Venmar air exchanger.
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