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    lcran's Avatar
    lcran Posts: 1, Reputation: 1
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    #1

    Sep 15, 2011, 12:00 PM
    The meaning of the indicator - Improper Unit Operation
    The burner flame test for the heating unit indicates Improper Unit Operation.
    Does that mean that the heat exchanger is broken and I need to replace the furnace?
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Sep 16, 2011, 05:20 PM
    Not sure with such little info of what you have. It could mean that the burners did not light, in turn would= bad ignitor, dirty burners, low or no gas pressure or just a dirty flame sensor.
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