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    roisag's Avatar
    roisag Posts: 2, Reputation: 1
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    #1

    Feb 24, 2011, 05:20 PM
    24 volt transformer burned up.
    I have an older Heil Model# NDGG100AF01 S.S.#H551-23415 Furnace. My main 24volt 40va primary transformer burned up. Could that have damaged the fan relay and the main gas valve. I replaced the transformer, wire for wire with the correct grainger purchased part, but I still can't get the main gas valve to open and fire up the burners. Thanks, Tom
    T-Top's Avatar
    T-Top Posts: 1,871, Reputation: 100
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    #2

    Feb 24, 2011, 07:50 PM
    The question is did the blower relay or gas valve short out and take out the transformer. If your handy with a volt meter we will need you to check resistance on the coils.
    roisag's Avatar
    roisag Posts: 2, Reputation: 1
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    #3

    Feb 24, 2011, 08:00 PM
    Comment on T-Top's post
    Both Coils were burnt up. What you're saying is that the main gas valve could have done the damage to both, correct?
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