I determined that nothing was blocking it draining and therefore the drain pump must be bad. Mind you, I did not test it, electrically, but it did not seem to be working when I went through the diagnostic series. So, I replaced it. Technically speaking, it was not a difficult repair...unplug the bad one...plus in the new one. But, it's a somewhat tough job to do, when you choose to do it without pulling the DW out and rotating it, like in the video. When you don't pull it out, you have to lie on the ground and work in a tight space. Again, it doesn't require anymore than a few working neurons, but doing it on the floor makes it take more like an hour, than like the 15-30 minutes it should otherwise. But, think of all the money you save by not calling the appliance repair shop.