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Burnham Steam Boiler Help
Hi all - new to this site and looking for boiler advice. Thanks in advance!
I have a Burnham low pressure boiler, steam heat, natural gas. The silver tag says: ANS Z21-13; 1989; Model no. 404B; serial no. 12 074015. I'm not sure when it was installed as it was in house when I bought it with no info. Any idea what year this is from? I can't find any info online for this.
Currently it will not stay on. I can light the pilot, turn it on, turn thermostat up, heat kicks on and all burner light up, and after about 2 minutes the whole thing, including the pilot kicks out. Seems like a safety feature, but i'm not sure what could be causing it to shut down. Anyone hear of something similar to this? I try this several times and get the same result. I've changed the thermocouple already.
Secondly, depending on the age of the unit (I'm guessing its at least 20 years old?), I'm wondering if I should invest in repairing the unit or if I should buy a new boiler for the house. If the best option is to buy a new boiler, curious what the best brands are that I should be looking at. Otherwise is there a part I should try replacing first, like the gas valve?
Other info: Boiler heats a 2 bedroom apt that is appx 950 sq ft. I shut it off in the summer since it only is used for the heat (hot water is separate). There are 4 radiators in the apt. The flue is connected to the chimney. I live in New England so currently its COLD! 18 degrees tonight....got space heaters going for my warmth, but a little nervous about the pipes freezing if I don't get this figured out quickly.