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    coldinpa's Avatar
    coldinpa Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Nov 4, 2010, 12:35 PM
    Our furnace blower continues to blow - cold air - after a heat cycle - help?
    We have replaced the filters and the limit control. Didn't help.
    ivanh's Avatar
    ivanh Posts: 52, Reputation: 3
    Junior Member
    		  
    #2

    Nov 4, 2010, 03:00 PM
    If the blower continues to run with no burner and the space temp is not satisfied (still calling for heat) then there must be an issue with the fuel delivery systems such as the pilot light goes out. If the pilot light flame is extinguished the gas valve will shut down. Could mean a defective thermal couple ($20 part).

    If the blower continues to run with no burner and the space temp is satisfied, then you may have set the thermostat to "FAN ON".
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Nov 4, 2010, 03:17 PM

    I agree with Ivan and think checking to see if your stat is set for fan ON or fan AUTO. Come back and tell which it is before doing anything else
    coldinpa's Avatar
    coldinpa Posts: 3, Reputation: 1
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    #4

    Nov 4, 2010, 07:31 PM
    Comment on ballengerb1's post
    Our thermostat isn't that clever - it doesn't have the modern options, only temp. It has an automatic switch, no pilot light. Keep the ideas coming!
    coldinpa's Avatar
    coldinpa Posts: 3, Reputation: 1
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    #5

    Nov 4, 2010, 07:34 PM
    Comment on ballengerb1's post
    Is there something in the furnace that a new stat would trigger that might have been inadvertently switched to FAN ON?
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #6

    Nov 4, 2010, 07:38 PM

    No little switch marked ON/AUTO frequently on the bottom edge. very unusual. Any chance of a pic or brand/model
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