Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
If our community has helped you, please consider making a contribution to support this website. Thanks!

Electric beaker shuts off

Options
iben
iben Member Posts: 1
in Domestic Hot Water

I have a boiler by utica boiler company model # MGB 150HD that the pilot is on but as soom as the ignition goes on, the switch in the electric panel switches off. WHAT COULD BE THE ISSUE?

Comments

  • mattmia2
    mattmia2 Member Posts: 18,041

    is it an ordinary thermal-magnetic breaker or does it also have a gfci or afci function? did it just start happening after previously working? if it is a 120v igniter or its wiring or control could be shorted. if it has a draft inducer, that or the control could also be shorted depending on when precisely it happens in the cycle.

    Big Ed_4
  • 109A_5
    109A_5 Member Posts: 4,405
    edited 2:06AM

    I can't find a manual that is specifically for the MGB 150HD, the HD is not listed, this wiring diagram is from a MGB 150K.

    Anyway if they are similar I'd be looking at the circulator(s). It looks like you can easily disconnect them and see if the overload goes away. Also inspect for crushed or otherwise compromised wiring.

    Also this is a bit confusing " pilot is on but as soom as the ignition goes on ", does it have a standing plot lit all the time or is there an ignition system that lights the pilot. If the ignition is used to light the pilot how can the pilot be on ?

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • 109A_5
    109A_5 Member Posts: 4,405

    Older standing pilot version MGB150, may need a screw driver and a bit more caution to disconnect the circulator wires. I'd still suspect the circulator or damaged wires.

    image.png
    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System
  • Jamie Hall
    Jamie Hall Member Posts: 27,766

    And note that there is no guarantee that the problem is in the boiler. First thing to do is to turn the boiler off with the emergency switch and try the breaker…

    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • 109A_5
    109A_5 Member Posts: 4,405

    Just to cover more possibilities, it could just be a soft circuit breaker and nothing actually wrong with your boiler equipment.

    Are there other loads on that branch circuit ?

    National - U.S. Gas Boiler 45+ Years Old
    Steam 300 SQ. FT. - EDR 347
    One Pipe System

Categories