3 year old 40 gal gas water heater.
Uses natural gas
All plumbing and venting 3 years new.
Mounted on two foot pedestal in garage.
Pilot went out Sunday.
Relit Pilot ok
Burner would not fire.
Tried several times over five hours with pilot off, relite no burner.
House water was hot all day.
House gas furnace was functional so not a gas supply problem.
Later that nite Burner fired up
Is this a problem or sign of failure to come?