Gas Dryer - No heat and coil doesn't glow

I’ve repaired this dryer twice now already myself.

The first time, I’d hear a click and the igniter would glow, but no flame. I fixed that by replacing the gas coils a year or two ago. I also replaced the limit thermostat (the little button that sits on the metal cylinder that contains the flame) first that time, but it didn’t fix the problem, so I also replaced the coils and that fixed it.

I also replaced the drum rollers this past fall.

Now, once again the dryer won’t heat, but this time I don’t hear any clicking and the igniter doesn’t glow. The dryer just spins.

So, what’s the most likely culprit in this situation?