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Burnham Boiler Clicking Sound Diagnosis

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spr1025
spr1025 Member Posts: 5
Hi all, hope your heating season is off to a good start.

I was wondering if someone could help diagnose a clicking/electrical buzzing sound coming from my boiler. Below is a link to a video.

https://youtu.be/8KK_8Ij-oQM

It seems to be coming from inside the boiler. It's very sporadic and happens throughout the entire heating cycle. It originally started at the end of last season, and appears to be getting more frequent. It sounds like a clicking sound when right by the boiler, but actually is quite loud upstairs. I also just noticed there's an electrical humming/buzzing coupled to the clicking sound.

Any thoughts? Thank you for your help!

PS, this is 1-pipe steam heat, but besides this sound there's no other issues with the system.