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Pressuretroll Mercury Switch Pinned But Boiler Not Coming On

RonWHC
RonWHC Member Posts: 232
in THE MAIN WALL
pigtail & any other syphon piping going to the pressuretrol.

Comments

  • Tom Hopkins
    Tom Hopkins Member Posts: 554
    If I pull the switch to off and let it snap back, boiler starts

    Lately, my steam boiler is not coming on a lot of the time when the T-Stat calls for heat.

    Upon inspection, I find the pressuretroll mercury switch tilted all the way back but it apparently is not making contact because if I pull the bulb foward and let it snap back the boiler fires right up. Sometimes I have to do this little flip the bulb thing twice.

    Do I need a new pressuretroll or is there something I could fix with the switch?
  • Mark Eatherton
    Mark Eatherton Member Posts: 5,858
    Do you have a multi meter???

    If you don't, it's kinda hard to trouble shoot. The problem may not be the switch. It could be the load, or maybe a wiring connection some place.

    ME

    There was an error rendering this rich post.

  • [Deleted User]
    [Deleted User] Posts: 672
    how old

    is the mercury switch? they do go bad. is the glass nice and clear or 'cloudy'?
This discussion has been closed.

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