Hi everyone: This morning as I was getting ready for work I heard a humming from the basement, I walked down and it appears to be coming from the boiler (it was firing). Could it be coming from the gas valve? Never heard this in my 12 years of living in the house. The only thing I can think of that may have contributed, is that last night our washing machine had a little bit of suds overflow which went on the floor and a little bit under the boiler and i used a shop-vac to suck it up. Could that somehow have screwed something up by my boiler burners? Is it a>safety issue? Potential fix? I've tried to post a video of the buzzing sound. Thanks for any help/guidance.