IF that 'fixes' issue.......buy a new thermal fuse and replace it.
Clean out combustion chamber.
Enjoy hot water :B
Thank you, thank you. Saved me a lot of time and hit the tail on the head. Thanks to everyone for there suggestions also.
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Okay now that you know what the problem is be sure to buy a spare fuse & keep it in your tool box. We had this same problem with a Jayco we had. Seems that water would drip down on the fuse connections and cause problems. Moved the fuse over & taped is up and it worked fine.
Happy trails,