Call for no hot water after recent vent work. Mr. English states that water heater shut off and continues to shut off after relighting since work was complete. He called AO smith and they advised that the gap around the draft hood was part of the problem. The gap in question is part of the double wall vent. He stated AO smith also states that the problem here is the draft hood, and stated that it must be a specific model of draft hood. I replaced draft hood with another model draft hood and lit water heater. It went out after a few minutes and tripped the FV switch. Mr. English states that he has had to press the block button each time to reset before the unit would light. Water heater is from 2018. Two years ago the vent was attached directly to the top of the water heater when contractors were performing roof repairs. Two days ago I installed a draft hood. We did not turn the unit off or otherwise adjust any settings. I attempted to perform fv reset via dial control reset and c
