If the ignitor glows yellow-orange for several seconds then it's fine.
It's too early to know whether your flame sensor has a problem. The furnace control confirms that the flame sensor indicates "no flame" before the ignition sequence begins, but the sensor won't be checked again until the gas valve has opened and the gas (should be) ignited. Yours isn't getting that far along. There's no need to tinker with the flame sensor until/unless there's reason to suspect it has a problem.
A furnace is equipped with (usually two) flame rollout switch(es). These are wired in series with the gas valve so that even if the control wants to turn on the gas these safety switches can prevent it. They're often manually resetable. Trace the conductors from the gas valve. They should lead to one or two switches looking something like the photo below (from www.repairclinic.com). Press the button on the back of the switch while listening and feeling for it to click -- this will indicate that it was indeed tripped and now is reset.
After checking/resetting the rollout switches try running the furnace again.
Flame rollout switches should "never" trip. If you find that one of yours did trip, or in other words if the reset method described above gets it running again, then a qualified person should check the furnace to hopefully determine what caused the trip and ensure that the furnace is operating safely and correctly.
