Replace the limit switch pack. Simple four wire one screw replcement. Just had ro do mine last fall. Cost less than 30 dollars at any RV dealer parts counter. Under the cover you will find two thermostat packs. The one on the left is 120VAC. The one on the right is propane control pack.
Fixed it. The thermostat was the problem. Thanks again to all. I learned a bunch about my water heater.
I posted earlier that I found the problem. I don't see the post so I will put it up again in case anyone has the same problem and wonders about the resolution.
I was checking for power at the switch in the wrong way as WMTire pointed out to me. I did have power at the switch. I checked the 120 W thermostat and found it open. I replaced the thermostat. I now have hot water on the electric side.
I do appreciate all of the posts. I learned some things about trouble shooting a problem like this. Thank you.
Shut off the power and pull some covers to look at connections. I had a badly burned terminal end but also discovered a bad limit switch. It's been awhile so can't be more specific. As I recall there are a couple small cap-like covers over the 2 limit switches. They were available at a camper dealer and I think they were about $30 each. I bought both but only needed one. Good luck.