I checked the control board,all of the rollout switch and the sensors. The gas valve was not giving off the gas to the rail. I put a new valve(honeywell) on the unit and the valve is still not releasing the gas. The gas is getting to the valve. The sparker is sparking and the valve is clicking open. The valve is clicking open and the sparker is arking. I have raked my brains, any help is good, I never ran across a problem like this one.