Jralphc
New Member
We bought a very old house that has 30 yr. old Weil McLane boiler for steam heat. Recently we have had an issue with the boiler shutting off because the pressure is too high. If I open the drain valve and let water out of the boiler until the system starts adding water back in to the boiler it will come back on and the pressure will start to drop back to normal. But eventually this will happen again; sometimes it will operate fine for a week or more and other times it will turn off again shortly after it re-started - it is definitely an intermittent problem. What could cause this to happen?