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

    Apr 28, 2010, 10:12 AM
    Symptoms of bad furnace mother board
    My furnace is 17 years old the problem is it will heat just fine but when it reaches desired temp it fires and shuts off constantly I changed t-stat and have same results the indicator light shows normal operation
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Apr 28, 2010, 11:13 AM

    Are you saying the heat will not shut off??
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