Returning tomorrow to install warranty parts on gas water heater installed by us After arriving to the home I was made aware that the water heater we installed approximately one year ago was not producing hot water, after assessment I have diagnosed the issue and found it to be a faulty gas control valve that is still covered under manufacturer warranty, after making the homeowner aware of this and returning with manufacture specified replacement parts and proceeded to drain the unit followed by replacement of the gas control valve and thermal couple, filling the tank and relighting the unit, at this time everything is functioning properly without failure