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

    Dec 9, 2007, 06:56 AM
    Honeywell programmable thermostat
    My thermostat's display is showing - AC and the heat will not come on, I removed it and replaced the batteries to no avail? What can I do to get the heat to work again? It is 40 degree's here
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Dec 9, 2007, 07:13 AM
    The thermostat is missing the 24 volt circuit from the furnace. The exact meaning is no power to the thermostat according to Honeywell.

    Could be a 24 volt transformer/fuse/triper breaker in the electric panel/etc.
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