We have a Whirlpool Dishwasher WDF520PADW3 that recently started leaving water in the bottom after the wash was completed. Nothing is abnormal with sounds and it appears the pump runs but a few of inches of water remains (and sits an inch above the top of the filter well).

It started just after replacing a garbage disposal (the outer case cracked and leaked) and cleaning out partially clogged hoses and pipes under the sink. No work was done on the dishwasher before it started acting up.

I've since replaced the hot water line (it was copper preventing pulling the dishwasher out) before changing the drain hoses (suspected a bad check valve).

The same draining problem still exists and I'm wondering if anyone knows of any other parts that could be the problem and how I might check them.

Thank you in advance for suggestions and information.

Bri