Just had my duet do the same thing
as the one in this topic (lights on, won't start) last night.
Turns out the door close sensor switch had broken off. There's a little black push switch at about the 2 o'clock position inside the door frame (above the door lock mechanism), and the tip of the plastic switch had broken off, leaving the hollow plastic pin exposed where it had broken off. What was left of the tip was nowhere to be found.
I temporarily fixed this by cutting a bamboo shish ke bab skewer tip about 1/2" long and poking it into the hole in the plastic. It's pointy enough to stay in place, and large enough to push the switch. A toothpick would probably be to small. Kind of a MacGyver fix, but hey at least I can wash clothes again

Now my problem is that I can't find the part number for that little bugger so I can replace it properly. Anyone know the part number or official name?
Model Number: ghw9100lw1
