Josh wrote:
The horizontally mounted motor on my 5 year old Whirlpool Model DP840
dishwasher has stopped running. The sprayer arm rotates freely when
turned manually. The machine fills and the inlet control valve shuts
off the water supply at what appears to be the correct point. The
timer progresses through all the cycles but the motor never kicks in
and the water never drains out. The motor body feels very warm to
the touch, so it appears to be getting some voltage. Any ideas?

The motor is probably shot. Could be bearings, could be electrical. I'd
pull it out and have it checked by a motor shop or just replace it. You can
get one from a local dealer or www.repairclinic.com They also have
troubleshooting help too.