Suburban SW10PE - pilot works, but main burner won't light

Thanks for the response!
I just tried moving the temp adjustment and it SEEMS to move the shaft, but as you can see in the picture it's completely covered by the plastic cap - so I can't tell if it's actually moving. That being said, it feels exactly how I would expect it to feel: smooth, light resistance. It doesn't 'catch' or 'slip' or feel loose at all.

In any case, it's currently below 30°F outside right now so I'd expect it to come on no matter where it's set(?)