Forum Discussion
dougrainer
Apr 17, 2020Nomad
That is an extremely OLD Atwood. I would say pre 1995. Since the WH is that old, I would replace the complete unit. The cause of that blowback was a restriction in the burner tube and/or restriction in the chimney exhaust, usually insect nests. This type problem rarely happens on newer Atwoods with the Flame/thermal sense fuse. It happens but the thermal fuse melts before damage to the water heater controls. Doug
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