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

    Dec 19, 2006, 10:38 PM
    Furnace stays on for 2 minutes
    I have a digital thermostat and my furnace seems to stay on for only 2 minutes at a time. It does this approximately every 10 min. The programmed cycle rate is 5/hr, so starting up every 10 min makes sense.

    If the programmed temp is 72 F and the room temp is around 72 F, it will start up as usual, but only stay on for 2 minutes then shut off. The fan also works.

    If I override the programmed temperature to 77 F, the furnace will stay on until the desired temperature is reached.

    Is it normal for a furnace to start up and run for only 2 minutes if the programmed temp is close to the room temp?

    Thanks.
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member
    		  
    #2

    Dec 19, 2006, 10:57 PM
    Is it possible that the air from one of your openings, that puts the heat into the room, could be blowing right on to the thermostat.
    kornholio's Avatar
    kornholio Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Dec 26, 2006, 10:07 PM
    The thermostat is not near any vents. Can someone tell me what the cycle rate setting for +/- 0.5 degrees means? Does it mean that the furnace starts up when the room temp is +/- 0.5 degrees from the programmed temp?
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