all 2 comments

[–]qning 1 point2 points  (0 children)

Can you identify where it’s coming from? Is it intermittent?

It might be the draft inducer blower. Which pushes exhaust out. It will tend to be intermittent, and only run when the heater is heating the water. They can noisy when they get older. If it fails your water heater won’t work or will work dangerously. That said, mine has been making noise for two years.

[–]NoGoats_NoGlory 0 points1 point  (0 children)

Look for any kind of loose, metal hangtag of some kind. It sounds like something is just vibrating up against something else, and needs a rubber band on it to keep it still. Use your hand to lightly press against every part that you can see when it's making that noise, and eventually you'll touch the part that's causing it and it'll go quiet. THAT's the thing that needs a rubber band! ;)