The water heater in my 25RKS has not worked on electric since I bought it earlier this year. So today I decided to do some troubleshooting and see if I could get it to work.
I found no 120v at the element. I checked the wall switch and relay and both were good. I confirmed voltage at the breaker so I started at the heater and worked backward looking for 120v.
I found that Jayco had run solid house type wiring from the breaker box and joined that to stranded wire just before the relay. That joint was made with an ill fitting scotch-lock type automotive connector. Both connections were loose and there were burn marks on the common wiring. See the attached photo.
I think this is not a very safe way make high voltage connections. They should have used an enclosed terminal block of some type.