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    Pressuretrol keeps cutting off boiler (7 Posts)

  • Bullethead Bullethead @ 10:44 AM
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    Pressuretrol keeps cutting off boiler

    Boiler keeps turning off.  I go to the basement and touch, just barely touch, the screw on the differential wheel of the pressuretrol and it clicks and boiler turns back on.  Picture of pressuretrol below.

    The boiler has been working fine except for rooms upstairs being too hot and some hissing/spitting from air vents.  So I thought I would try turning the pressure down from 1psi to .5psi.  Did that yesterday and ever since this problem has been happening.  Seems to turn off every hour or two.  I put the pressure back to 1psi and it is still happening.

    Is this common?  Easily fixable?  Or do I need to move into the basement 24/7 until I can get someone to come replace the pressuretrol?
  • Bullethead Bullethead @ 12:20 PM
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    Pressuretrol keeps cutting off boiler

    It is has cut out twice more.  Once I tried touchy the screw on the differential wheel with scissors and it turned on.  Then I tried my finger.  The very lightest touch of the screw and it clicked and turned on.
  • Jamie Hall Jamie Hall @ 12:28 PM
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    That type of pressuretrol

    just isn't reliable at that low a pressure.  Try turning it back up to 1.5...
    Jamie

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-McClain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • Bullethead Bullethead @ 12:46 PM
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    It was working fine at 1psi before-fingers and scissors

    What is happening when I touch the screw that kicks it back on?
  • Bullethead Bullethead @ 2:24 PM
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    Have to touch Pressuretrol every 30 mins to keep boiler running

    I am in the basement now every 30 minutes to keep the boiler running.  I have to touch the screw on the differential wheel very lightly and it "clicks" and seems to go in slightly.  The boiler kicks back on.  What could this be?
  • Jamie Hall Jamie Hall @ 4:24 PM
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    It's just a guess

    but I'm going to guess two things: first, something may have come adrift in the linkages when you lowered the pressure.  This is by no means unheard of.

    Second, the differential may be so great that it trips off, but won't trip back on.

    Check both, and if you find something has come adrift, when you put it back together make sure that you set it high enough so it doesn't happen again.
    Jamie

    Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England.

    Hoffman Equipped System (all original except boiler), Weil-McClain 580, 2.75 gph Carlin, Vapourstat 0.5 -- 6.0 ounces per square inch
  • Bullethead Bullethead @ 6:52 PM
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    How do I check if something is adrift?

    Thanks but not sure exactly what to check to see if adrift.  I just turned it up to 1.5 psi and 1.5 on the differential. Maybe this will make a difference?  What else can I try?
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