We were having the exact same issue with the water heater in our 2018 Hideout FW. We replaced the control board with the Dinosaur Electronics control board and it was much better. However, we still had the occasional failure. It always seemed to start when turning it back on but was iffy later. I was told the Dinosaur Electronics support was great so I called them. The tech suggested I reset the gap of the starter electrode assembly, clean the gas tube as spiders can block the flow and make sure the burner tip was clean, I used a broom straw to clean out the burner tip. I found the gap of the starter electrode to be too close and reset that according to specs. Since then it works perfect. Dinosaur Electronics products and people are great!
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Tom
2018 Hideout 299RLDS
2015 F350 SD Lariat Platinum Crew Cab, 6.7 Diesel
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