Thanks to guidance from the Forum, I determined the problem was the control panel The part is expensive, but a lot cheaper than replacing my 7-year-old dishwasher. Removal and replacement were fast and easy (about 20 minutes), and I did not have to take the whole door apart, just 6 screws on the top, and CAREFULLY popped the new panel in. A little fussy to line up 6 alignment tabs on the vertical plane of the door at the bottom of the control panel and two catches on the horizontal plane, at the door latch but they finally submitted to my will. Now it is back in business.