I have been having the same issue with my 2012 31BH. For the last 2 yrs. They say that nothing is wrong, but at the end of this year it is going in and i don't want it back until they figure out what the problem is. It throws the main breaker at least once a trip. I make sure i have nothing else on. I run the hot water off LP and the only other thing pkugged in is our bar fridge in the outdoor kitchen. It never fails, it happens all the time.It's really starting to "P" me off.
The Fabbro Family
Rodney Ontario Canada
2012 31BH Sunset Trail Reserve
2013 Dodge Ram Sport R/T 5.7 Hemi(Pics to follow)