Honeywell Gas Control Valve Reset. This has happened to us twice and both times has resolved the issue. Turn the water heater 's gas valve switch to the off position, wait for a few seconds and then flip the switch to the on position to reset the system.
Follow the appliance manufacturer instructions if available; When the thermopile can’t do its job of producing enough current, called millivolts, to operate the control board in the gas valve, the control board won’t work, which causes the gas valve to close. Otherwise, use these instructions as