JWWebster: Thanks for the insider tips! Would the moisture sensor still come into play in the Timed Dry setting, or just the automatic setting? The manual implies only on Automatic.
When it stops, if we do nothing the timer continues to advance at its regular pace, even though the dryer is not turning, for what that's worth.
The next time it happens I'll try to turn the tumbler manually. If I have to get inside, what is the sequence for getting the panels off? The top seems to be a separate piece and the front consists of two panels.
We will be out of town for a week (without internet access most of the time), so unless it fails today, I'll have to wait a week to do more diagnosis.