Washes dishes just fine will not drain.
The most likely cause for the unit to not drain would be a faulty piston and nut assembly WD24X10018. You will want to check to make sure that there is nothing caught in the pump also.
How do I remove this item from my unit?
Answer Hello Amy,
In order to remove the sump inlet you will need to pull the unit out from under the cabinet. Once out you want to roll the unit onto its back. You will have to remove pump assembly in order to remove the sump inlet.