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5psi to get Mercury Switch to Trip

TomBk
TomBk Member Posts: 2
in THE MAIN WALL
Boiler was not responding to thermostat and I had to crank the pressure up to 5psi to get the mercury switch on the pressuretroll tilted back enough for it to trip and the boiler to come on. The pressuretroll and pigtail hasn't moved since it was working right with about 1.5psi differential. The pressuretroll is very old though.

Any ideas on what steps I should take to troubleshoot?

Comments

  • ttekushan_3
    ttekushan_3 Member Posts: 961
    clog

    The pigtail its mounted to is clogged.

    When everythings back together make sure the pressuretrol is LEVEL.

    Terry T

    steam; proportioned minitube; trapless; jet pump return; vac vent. New Yorker CGS30C

  • Ed_13
    Ed_13 Member Posts: 164
    Cleaning out the pigtail did it

    That did it. Thanks. Regards, Tom
  • tom_82
    tom_82 Member Posts: 66
    pressuretrol

    just curious.

    When your pressuretrol is working can you actually see the switch (mercury) move?
    I have stared at ours as intently as i've stared at anything in my life and it does not move a millimeter.
    Thanks
    TOm
  • tom_82
    tom_82 Member Posts: 66
    pressuretrol

    just curious.

    When your pressuretrol is working can you actually see the switch (mercury) move?
    I have stared at ours as intently as i've stared at anything in my life and it does not move a millimeter.
    Thanks
    TOm
This discussion has been closed.

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