I called the helpful people at appliance parts pro. They said it could be three parts, so I ordered all three. It was December 23, and we needed our dishwasher for Christmas. I overnighted the parts, and they arrived on Christmas eve. I watched the video twice before starting. I tested the thermal fuse and there was no continuity. I cut out the defective fuse and replaced it. It worked, a Christmas miracle.
I will send back the extra parts for a full refund. I told everyone about the story and I will continue to recommend appliance parts pro in the future.