Water was leaking from the diverter motor
M B M. • Vicksburg, MS • February 21, 2015
My Repair & Advice
The diverter motor turns a plastic shaft that extends through the sump housing and turns a flat round plate called a diffuser. The rubber o-ring seals built into in the sump that prevent water from leaking past this plastic drive shaft had worn out - not the best design.
Replacing the sump is not quite as easy as is depicted in many online videos. The recirculating pump is plumbed to the sump with a hose (rubber elbow hose) held in place by two narrow pinch-clamp hose clamps. The clamp on the sump end of this elbow must be cut to allow removal and reconnection of the recirculation pump to the replacement sump. These clamps are special hose clamps that are not easily found by themselves. They can be bought in a kit including a replacement rubber elbow (part no. W10445975) for over $40. They are also sold individually (part no. AP5306815) for over $12 each. Both the kit and the clamp are very over-priced. A word of caution - regular 1/2" wide hose clamps do not work well. The 5/16" clamps have to fit into narrow slots circling each end of the rubber elbow hose. Whirlpool made these dishwashers to discourage anyone from repairing them due to the expense.
I went ahead a purchased the narrow clamp and put the dishwasher back together. Everything works. Hopefully the dishwasher will last another 3 years before it starts leaking again.