I've got a wierd one going here. I've replaced the dispenser because it had a hole in it resulting in rinse aide leaking out all the time. Customer called back saying she had "bubbles" left in the bottom of the machine and on her upper rack dishes after a cycle. I did some research then replaced the main board. Its still doing the same thing.
I read somewhere that the "chopper" can cause this issue.
Any other idea's? I hate looking stupid in front of a customer.