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Primary Controls Dying

Nikkat01Nikkat01 Posts: 1Member
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?


  • woodrowwoodrow Posts: 24Member
    broken wire feeding control or low voltage
  • CTOilHeatCTOilHeat Posts: 51Member
    What primary was there and which did you replace it with? Where are you measuring no power?

  • Jamie HallJamie Hall Posts: 12,100Member
    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.

    Hoffman Equipped System (all original except boiler), Weil-Mclain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
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