Some times my water heater gives out a loud tone, when it's heating up, sometimes not always. I've seen posts about banging and thumping but not about a tone. Last night it went off and it was so loud it woke me up.
It's about four years old. I have really bad water here so, every spring and fall, I take the bottom element out and clean the tank with a shopvac and hose to get all the sediment out. Sometimes I replace the element sometimes not. This last time about a month ago, I decided I would go ahead and replace the top element too since I can't remember if or when I've ever done it. Now a month later this sometimes tone.
Anyone know why? Thanks