Congratulations on the new RV. Hope you enjoy many happy miles. It is not at all uncommon for water heater control boards to “go bad”. There are lots of videos on YouTube that go through the troubleshooting drill. If you do need a new controller I strongly recommend getting it from Dinosaur instead of getting the OE cheap Chinese part. It’ll run about $100. Good luck. Sounds like your issues so far are pretty common ones.
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