MJ, have the same issues on my 2017 Flagstaff I picked up 2 weeks ago. Was able to get by on electric on first trip out last week end. Refrig, stove in outside kitchen are downstream from water heater they work fine. The reset button will not move, it is stuck or broken. When switch is turned on, there is clicking but no gas smell. I had a limit switch burn out on previous unit after heater was turned on with little or no water in tank. I remember that the electric was on during dealer walk through. Propane was discussed but not demoed.
Marriot2 on Wheels 2017 Flagstaff Classic 832 OKBS
2013 GMC Denali 6.6L 2500 HD DMAX w\Alison Trans
Pepper Pomeranian rescue 121 days as camping buddy
Days camped in FR, 2011 = 20, 2012 = 57, 2013 = 59
... 2014 = 39, 2015 = 52, 2016 = 77, 2017 = 11