Hissing water heater

[Steve S]

Hi guys/gals, for the last few weeks when the water is heating up on electric it's been making a hissing sound. There's no leaks the pressure release valve is fine. The hissing sound is the same sound like I have the gas on but I don't.
The water's hot, pressure is fine and no troubles there.
It's just annoying and I'm wondering if maybe the element is on it's way out?

[bobbecky]

Ours does that too. It's just the water reacting to the hot element, just like water in a pot, boiling on the stove, just more intense. I've noticed the sound for a long time, so don't think it's any reason to worry.

[Steve S]

Yeah I figured that it's not a big deal as it doesn't affect anything I'm just wondering why it just started now.

[bobbecky]

I've noticed that too, sometimes it's quiet. Don't know if it's the incoming water temp, air in the water, or just background noise masking the sound. I just did my annual service of the water heater, new anode, flushed the tank, and I don't know if it's because of the tank being clean, or if it's not having the A/C running as much, causing noise to mask the other sounds, but it does seem to be hissing a bit more. I just figure, it is letting me know it's happy and working

[Steve S]

The day after I posted this the hissing stopped and I haven't heard it since
I think that the next time I have a problem I'll post about it as it seems to fix it without me doing anything!