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

    May 24, 2009, 10:26 AM
    Combustion fan and blower run non-stop
    My son put a tennis ball in the vent tube and it rolled all the way to the furnace blocking the air from entering the burners. I have a armstrong ultra 90sx furnace and the combustion fan and blower run continuously. I have taken the tennis ball out and it still runs
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    May 24, 2009, 09:23 PM
    Reset the vent limit switch on the furnace. Inside the furnace around the vent pipe two wire going to a small disk with a button in the center. Or just try killing power growing to the system and turn it back on.
    KC13's Avatar
    KC13 Posts: 2,556, Reputation: 99
    Ultra Member
    		  
    #3

    May 25, 2009, 05:53 AM
    Swap the tennis ball for a ping pong ball. They will launch out of the vent much more easily when your son wants to practice returning serves.:D
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