Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
Weil Mclain boiler turns off at low temp
I have a 5 yr old Weil Mclain CGa gold hot water boiler. The problem it doesn't heat up to the right boiler temp at times. You first notice that the room temp can't be achieved. Then I notice the cast iron radiators are just warm to the touch. Go to the boiler and see the digital boiler temp module (Weil Mclain 1135) is cutting off at 140 degrees. If I just move the dial slightly it jumps to 182 and the boiler begins to heat normally. This has happened 4 or5 times in the last 2 heating seasons.The energy saver dial is set to max but has since lowered it 1/4 turn. Could the problem be as obvious as a the control module? Are there other parameters involved? Thanks Mike