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.

Old Mini Therm II not shutting Down

StorzinVail
StorzinVail Member Posts: 1
in THE MAIN WALL
Had to repair a bad pump and a blown line. Now the boiler will not shut down when it gets to the high limit. Checked the limit switch and it's breaking contact, if I pull the MV socket the boiler will shut down, but other wise it just keeps heating up until I shut it down manually. Ideas, Please?

Comments

  • Jamie Hall
    Jamie Hall Member Posts: 25,691
    Hopefully somewhere in the wiring from the limit switch to that socket there is a short. Or it got mis-wired somehow.
    Br. Jamie, osb
    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England
  • Zman
    Zman Member Posts: 7,611
    edited December 2019
    There was a period of time when Teledyne Laars employed an absolute psychopath to install zip ties on the control wires. I have seen them so tight they crushed the insulation and shorted the wires. I would try turning it all power off, cutting the ties and inspecting the wiring.
    "If you can't explain it simply, you don't understand it well enough"
    Albert Einstein
    delta Tkcopp

Categories