Our water heater has started turning on with a big bang occasionally -- I would describe it as delayed ignition where the gas valve opens but then is not ignited immediately. It started doing this as the weather got cold. The pilot light is on and the status LED blinks normal function.
The gas valve is a Honeywell WV8840A1000. I suspect either the supply line is restricting the gas flow to the pilot flame, or the pilot flame has somehow moved away from the burner.
The gas valve is a Honeywell WV8840A1000. I suspect either the supply line is restricting the gas flow to the pilot flame, or the pilot flame has somehow moved away from the burner.