Question: My GE Profile Dishwasher, Model Number gsd5940d00ss, has 2 inches of water left in the bottom of the dishwasher at the end of the dishwasher cycle. What is causing this?
Answer: If the drain line isn’t clogged or kinked the Piston & Nut Assembly is most likely the dishwasher part causing your problem. The piston and nut assembly is for a check valve. It is used on General Electric, Hotpoint, and other brands.
To check it, remove the screen/filter in the back of the tub. Once done you will see the Piston & Nut Assembly. Remove it by simply unscrewing it. This part has a plunger on a spring. When you press up on the plunger it should completely stop up the hole in the top of the part. Sometimes the rubber top part of the Piston & Nut deteriorates and the part needs to be replaced.
Other causes of water not draining from your dishwasher can be: