What should I do if my dishwasher won't fill?
Check if the overfill protection float (located in the front right corner of the dishwasher tub) is able to move up and down freely. Press down on the float to release it if it appears stuck. The overfill protection float must be in place and functioning for the dishwasher to operate properly. (Page 15)
From the official Whirlpool W10021620 Built-In Dishwasher manual, page 15
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