i would check the two thermostats first, (unless the element was turned on with no water in the tank).
they are cheap and will get crud between them and the case and cause a "no workie" condition
as a short fix you can peel back the rubber seal that protects them and spray some wd40 or similar to get the backs of them to make a better contact with the case
reset the breakers and try again
i replaced mine with a kit from atwood..less than 20 buckaroos
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, no your eyes are fine, there are 6 slides