Removed the panel under the door and drained the water from the washer. Then removed the top and found no obstructions with the dispenser motor. Isolated the dispenser motor, checked the resistance in the motor and discovered the motor had failed. Removed and replaced the motor. Incidentally, I paid an extra $6.00 for guaranteed two day delivery and I received the motor in 1.5 days. Kudos to Appliance Parts Pros. I washed a load of laundry with the top off to check for proper operation of the linkage components and discovered the linkage was rough and bouncing. The linkage from the dispenser motor to and including inside the dispenser box was removed, thoroughly cleaned with a vinegar solution and reinstalled. Another load of laundry was washed while observing the operation of the linkage. The motor and linkage functioned flawlessly. I was quite surprised how a very small buildup of calcium/grit on the linkage could affect the operation as it did. Lesson learned was to clean the linkage on a semi-annual schedule, which should increase the longevity of the dispenser motor.