Update. I replaced the air pressure switch, don’t think that was the problem. I also replaced the temperature demand probe. Not sure about that. I did find one of the 5 amp fuses (there are 2 of them on the board) that was blown. I put two new ones in. Before I did all that I unplugged from shore and disconnected the battery. So I now have a constant flame but little to no hot water. There is a constant blue flame but the coils are like warm at best but could probably not quite warm either. Waiting on the two stage regulator and the electrode flam probe. A tech said there should be a green light in the board. Anyone have an idea where that is on the mother board.
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