Atwood Water Heater

Seems to be a lot of "weeping" relief valves.

Here is a snapshot of a portion of the Atwood User's manual. Most of the time, this is the solution for this problem.




Tom

No, if you lost a gallon or more out of the water heater you are good.

Oh, and another issue I had with our water heater, before this present issue, happened last week. Just wondering if the two issues could be related.
Last week the plastic drain plug failed. I came outside and found water leaking from around the drain plug. The head of the plastic plug was loose from the base of the plug and easily broke off leaving the threaded portion stuck in the water heater drain hole threads. Of course I lost most all of the water in the water heater during the removal of the old plug and installation of the new plug.

Could this speak to the need to follow the suggestion that I open a low point drain and re-establish the air chamber in the heater?

Is it possible that it's an issue with the thermal cut-off switch?

or the thermostats?

Shut off the water heater, then open low point drain and faucet to re-establish the air chamber in the water heater.
If this doesn't solve problem then, The pressure relief valves give out. You may swing by your local hardware store and get a new one. Read tag on your current one so as to get the correct one.

They can act up - especially when they get some age on them. Sometimes it is as simple as a small piece of dirt or scale is caught in the valve not allowing it to seal properly. Turn the heater off and let it cool down so you don't get burnt, then push the lever on the valve a few times to try and blow it out. If that doesn't work, the easiest thing to do is replace it - they are not very expensive.