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

    Aug 16, 2011, 03:53 PM
    Can I wire a digital thermosat to a Day and Night furnace to run only the fan?
    Can I wire a digital thermosat to a day and night furnace to run the fan only in the summer time?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #2

    Aug 16, 2011, 04:05 PM

    Yes, nearly all thermostats have a small slide switch on the side that says fan ON/AUTO, if you have that then set to fan ON. If the stat is fully digital tell us the brand and model
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
    Plumbing Expert
    		  
    #3

    Aug 16, 2011, 04:30 PM

    Depends on if you have enough stat wires from furnace to stat. There should be a g terminal in the stat, and a g terminal on the furnace control board. If there is a wire hooked between these leads, when you switch the stat to fan on, instead of fan auto, the fan will run constantly.
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