The problem was the blower wheel had broken where it attaches to the motor shaft. Without airflow, a thermal switch shuts down the gas flame. Replacing the fan was quick and easy - especially when AppliancePartsPros.com delivers parts so fast. It’s a pain to access some of the many screws to get to the fan and a special tool is required to remove the C-clip retaining it. After removing the broken fan I spent half an hour vacuuming lint from every reachable location inside the dryer. When I replaced the fan I didn’t replace the hose clamp retainer as I didn’t like the stress it applies to the fan hub. I did place a very thin shim into the gap where a flat on the motor shaft mates with the fan to snug it up, then put the C-clip back in place. (I admit to overthinking my repairs and just replacing the fan with the hose clamp and C-clip is likely just fine).