Yesterday evening, we set our dishwasher on delay to run during the night. An annoying hum woke us up in the wee hours of the morning, and we found that the machine would not move past the drain cycle. It just keeps trying to drain water, even after it is empty. If you push the cancel/drain button twice (once to drain, and once to completely cancel), it will finally stop. We started it again this morning, and it fills and washes just fine, but if you hit the cancel/drain button, it continues to drain without stopping until you push the button again. (This model only has buttons--no knobs--so I can't test various parts of the cycle. You can only start a cycle, or cancel it). Any help would be greatly appreciated!