Dishwasher showed CLEAN after only a few minutes running. There was water remaining in the pan. I first replaced the control unit. Same results. I then replaced the drain pump. SUCCESS! The original pump appeared to be fouled with debris. Given the price of the pump, it makes sense to replace it rather than attempt to clear it. The pump may have also been damaged by the impeller motor not turning well. YouTube videos show how to repair the dishwasher. The pump replacement recommendation came from AppliancePartsPros videos.