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Should my view port / sight port be sealed?

wf
Member Posts: 6
in Oil Heating
Recently moved into a 1940's cape with single pipe steam heat system. Should the view port / sight port on the furnace? boiler? be sealed? Every now and then I smell burning oil when the system turns on.
0
Comments
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The boiler may need a cleaning
Also the chimney may need cleaned.Cost is what you spend , value is what you get.
cell # 413-841-6726
https://heatinghelp.com/find-a-contractor/detail/charles-garrity-plumbing-and-heating0 -
view port
Unless it is a pressure-fired boiller it does not need to be sealed. You have a draft problem or a partially plugged boiler.0
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