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Primary Controls Dying

Nikkat01 Member Posts: 1
I woke up to a completly dead primary control. I installed a replacement. Everything fired up fine and ran for about a minute. Then it shut down and no power in the new primary control unit. Anyone know what could be causing this?


  • woodrow
    woodrow Member Posts: 40
    broken wire feeding control or low voltage
  • CTOilHeat
    CTOilHeat Member Posts: 54
    What primary was there and which did you replace it with? Where are you measuring no power?

  • Jamie Hall
    Jamie Hall Member Posts: 19,398
    If the new primary itself actually failed (check the power feed as @woodrow and @CTOilHeat have suggested first), check for a bad or non existent ground or swapped neutral and hot feeding the unit. Also check for "dirty" power (spikes, dropouts).
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England