I have a old Burham Holiday boiler 6-w-20 series 2, the burner will not shut down and pressure release valve blows at about 32 lbs, the wall thermostat can be all the way down but it still happens. thanks for the help !!!
With burners not shutting down you could be low on water, expansion tank faulty, limits not working, aqua-stat not sencing temp. I would ask you to call a pro. If the temps get too high this boiler can blow.
I understand this is a DIY site and while all for that when a boiler is raising the pressure and actuating the TPV then this is serious and not a DIY project.
John Wayne once said "Life is tough and it is even tougher if you are stupid"
Tempstar and Trane Dealer
Last edited by Plumber101; 10-15-2009 at 11:23 PM.