I asked customer service at AppliancePartsPros.com for help, after describing my dishwasher symptoms. I had an answer in less than an hour, pointing to the drain pump as the probable culprit. I ordered a replacement, and it arrived in a few days. The repair video described the procedure, and it made the repair fast and easy. The dishwasher is repaired.
Replacing the door was the most challenging. There are two plastic clips that sit on the door panel near the bottom. The top of the door slides up and engages with the plastic control panel at the door top, then the plastic clips push into slots on the frame.