Whirlpool dishwasher will not drain

Dishwasher Repair
1

My Whirlpool Quiet Partner II dishwasher, DU1100XTPS7, will not drain. When i press the Cancel/Drain button I can hear a faint hum coming from the pump under the dishwasher. No clicks, no motor movement, nothing. Any suggestions on what to check? I already pulled the dishwasher out and pulled the hose to allow it to drain out.

2

Here are your parts
Model DU1100XTPS7

Here is a tech sheet
https://www.servicematters.com/docs/wiring/Tech%20Sheet%20-%208572216.pdf

Since you have pulled it out I assume you have checked for a plugged drain hose.

Could be your pump Item 17 in “Pump & motor parts” is either shot or has something jamming it. If it is the part that is humming you know it is getting power.

3

Thanks for getting back to me. No blockage in the hose. I pulled the pump (part #17) and pressed the cancel/drain button. It does spin! Happy about that. Looking inside where the pump connects, I can pull up the rubber flap and still no blockage. Could there be something in the Sump (part #4) that is blocking it? If so, is it accessible from underneath the dishwasher or do I attack it from the inside under the spray arm. Thanks again.

4

Here is a link that should help
Replacing Kitchenaid and Whirlpool Tall Tub Dishwasher Pumps