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    Frankman Posts: 1, Reputation: 1
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    Oct 23, 2011, 09:10 PM
    Furnace blowing cold air and running all the time
    Hello everyone

    I have a furnace type armstrong ultra sx 80 model guj100012
    The furnace worked perfect but today the blower is blowing cold air .
    I reset and start the furnace again , it worked perfectly but after 10 minutes the same cool air is coming and the burner is off .
    Can you advice me about this problem
    Thanks in advance

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