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    Jay77's Avatar
    Jay77 Posts: 1, Reputation: 1
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    #1

    Nov 4, 2017, 10:28 AM
    Furnace burning up transformers
    Nordyne E2EB-015HA
    No power to tstat. Traced problem back to transformer. Only 3v on secondary. Replaced transformer & consistently have 243v primary & 26v secondary. Fan works fine. Cool works fine. As soon as heat is turned on transformer starts popping & burning up.
    What would should I check next?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Nov 15, 2017, 08:18 AM
    Either the Heat wire is shorted, or Contactor/Relay Coil is shorted.
    Try removing the low voltage wire at the coil of heat contactor, and try again, if it doesn't blow, it is the relays coil, Maybe add a 3 amp blade fuse holder first to protect the transformer. 40 VA? Good Luck
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