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    mikey007 Posts: 6, Reputation: 1
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    #1

    Nov 9, 2011, 07:09 PM
    Central gas heat
    When I turn thermostat on for heat,the gas will not ignite--I get 4 red flashes on my control board indicating (Thermal Detection Device Open).Does anyone know where the reset switches are?If I could find them I could possibly find out which device is faulty&staying open.The unit is an American Standard Freedom 80, made by the Trane company.The unit was installed in 1996. Can someone please help?


    Model#AUD100C948H3

    Serial#L373N7J2G

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