Goodman GMP075-3 ignition problem. When I turn on the power, the inducer comes on, the control

Question

When I turn on the power, the inducer comes on, the control board clicks, the ignitor bar glows, the board clicks again, and the ignitor bar stops glowing. It seems like the gas valve isn't opening to allow combustion of any kind. I've replaced 1 rollout switch, the flame sensor and the control board. What should I do next? Replace the limit control switch and the pressure switch? How often do gas valves go bad? Could it be that the gas valve has stopped working?

I have the same exact ignition problem. My Goodman furnace is less than 3 years old.