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Question DetailsAsked on 6/23/2017

is burner supposed to be lit all the time on gas water heater

I put in new thermocoupling and when I turned pilot back on and raised temperaure, the burner lit also. Is the burner supposed to stay lit

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1 Answer


Because the tank has been without heat during the repair (say at least 10-15 minutes or more) the water in it would have started cooling down to room temp, so it should fire for at least a few minutes to bring the water back up to standard "hot" temperature. If the water heater was out of service for an extended period (say 8-12 hours or more) as it likely was unless you had a spare thermocouple right at hand, it might take a full firing cycle of maybe 10-15 minutes to bring the water up from room temp to your setting.

So yes, the burner would normally kick on as soon as you raised the temperature back up from Low or Vacation or whatever you had it set down to. Course, when the water is back up to the set temp, then the burner should shut down as it normally does, leaving the pilot burning.

Answered 3 years ago by LCD

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