Steam boiler: high limit pressuretrol tripping


Old 01-28-15, 05:49 PM
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Steam boiler: high limit pressuretrol tripping

I have a weil mcclain eg 50 about 6 years old, today I had to manually reset the high limit 2x because of no heat.

the only thing I did notice that was odd was the site glass was filled to the very top and i've never seen that before. i drained the boiler to the normal spot on the site glass and ran again and finished the cycle bringing the house up to the set point on the thermostat. Will see how it goes thru the night.....could the high water have caused higher pressure then normal cause it to trip? If not what can cause this?
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Old 01-28-15, 06:10 PM
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When you drain the water does it start. If the water is that high it gets into the pressuretrol it could cause the switch not to reset or you could have a clogged pigtail(curly pipe on pressuretrol).
The first thing is find out why your boiler is overfilling.
What are you resetting.
Old 01-29-15, 03:01 PM
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i drained water to normal level reset it and its been fine since? keep an eye on water level .....low water sensor maybe messing up?
Old 01-29-15, 03:53 PM
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Bill, what kind of regular maintenance does your boiler get?

What are the settings on your pressurtrol? (the one on the front, AND the dial inside)
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