Dishwasher not drain properly,a little bit of water stay inside

Dishwasher Repair
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1

I can’t see anything clot it out side of the screen. I don’t know how to removed the screen to see inside. A little bit of water stay inside the Dishwasher. Any suggestion? :frowning: :confused: :mad:

WHIRPOOL DU800SWKUO FL 3121637
TYPE 280-0

2

Here are your parts
Replacement parts for DU800SWKUO models | AppliancePartsPros.com

Here is a service manual for a DU800 series, yours should be close.
https://secured.whirlpool.com/Service/SrvTechAdm.nsf/2cd44500d572193285256a45004fd9d6/56e33eb0e839a7fa85256a8e00510938/$FILE/4322430.pdf

First check your drain line and house pluming for a partial plug.
One area that can be a problem is where the drain hose goes over the fitting into the house plumbing.
If OK then I would take the pump apart.