[mommylam]

My dishwasher is not draining so I started taking some of it apart. Could not figure out how to undo the hex nut black thing just would spin. Do i need to hold it still with a one inch wrench while turnin the hex nut? I think it is clogged under there somewhere?.

[Gene]

The first thing I would check is the check valve (#15 on the break down diagram). Remove the drain hose from the check valve and unscrew it from the pump. Most likely there is a foreign object stuck inside.

Here are the break down diagrams for the Whirlpool dishwasher Model DU943PWKT0

Gene.