https://imgur.com/a/vZkMuQP Not sure if the right place to post, and I'm going to contact my service provider, but wondering if anyone knows why. Had a old (possibly) 1950s American Standard oil boiler cleaned yesterday as part of their annual service, and it started making a loud buzzing noise when it runs. The noise is definitely new and didn't occur when they cleaned last year. Imgur linked above with audio.   submitted by   /u/KelloggMcDaddio   to   r/HomeImprovement [link]   [comments]