Purchased a Reliance water heater model 6-40-NOCT 400 on 9/13/22. Installed without any problems in a rental unit for a single mom. However, the heater does not work. Problem is the pilot light will light and stay lit, but the gas valve status light never blinks no matter how long you hold the pilot on. Called Reliance and they said to use the reset button which I tried. The button does not work. Called Reliance again and they said it must be the gas valve. They sent a new valve and I installed yesterday. Still have the same problem. Reliance is located in Tennessee and not open on weekends.