[DutchmenSport]

Possibly a burned up heating element. Disconnect the wires and test it with a volt meter.

In home water heaters, if they are not cleaned out periodically, lime builds up in the bottom of the tank. After years of use, the lime forms into a block of rock. As it grows bigger and bigger it eventually gets tall enough it touches the lower heating element. When that happens, the heating element burns out.

If you haven't flushed your tank in a while, it's possible it has build up and that could have shorted out the heating element. I'm just guessing, but it's a staring point. Checking it cost nothing if you have any kind of meter that will detect continuity.