About a week ago my GE Profile dishwasher stopped draining after the final rinse cycle. We always rinse dishes in the sink prior to loading the dishwasher and earlier this year I installed a new stainless steel sink, new air gap assy as well as disposal hose. I also had the disposal apart and cleaned out so I knew this should not be a blockage issue since water drains fine into the disposal after the wash and first rinse cycles. Only after the final rinse was the tub still full of clean water. Tired reset a few times but did not help so I got out my shopvac. Read all the posts I could find and one cyoungms. I checked the Drain check valve & after 9 years it still looked okay - it sealed the hole. While not sure if repairing was worth it I removed the unit while looking for a replacement DW. I removed the drain pump and the impeller seemed fine but I then saw the Valve Flapper had torn and the center part about the size of a dime fell out of the black connecting hose. This seems to be my problem - any other thoughts?

Can you explain how this valve flapper works with the check valve assy?

Thanks,
GEEverything

Thanks for the advice and for everyone who has had similar problems. Thanks for taking the time to post your experiences. After reading your posts I decided to order the three parts that seemed to need replaced first. I replaced the Piston & Valve assy, Flapper valve and Check Valve assy. I removed the main pump assy and drain pump also to check while I had it flipped on its side - they looked ok, impeller and chopper blades - nothing I could see as a problem. Everything looked pretty clean for 9 years old. Put it all back together and got out my shop vac just in case. Tried a "rinse only" cycle and as luck would have it, my wife happened to be standing there to watch. Knew something was wrong when she said yelled that water was coming out on top of the sink, yes sir, I forgot to put the cap back on the air gap assy that I removed earlier while reconnecting the drain line. Good part was no drips or leaks under the dishwasher so once the air gap cover was on, I ran a full wash cycle and it worked like new. No more water in the bottom of the tub after the final rinse.

Now on to my next GE Profle appliance problem. GE glass top range rear heating coil stopped working.

Thanks again,
GEeverything