Jeff for Model Number GSD3600G00BB Hi, I've checked for any hose blockages to/from the dishwasher to disposal and there do not appear to be any. Water seems to drain fine while the sump is in operation (I see water flowing into the disposal). Then the pump tub area fills back up again to the top of the sump cap after the pump ceases operation. I don't think that much water is supposed to be left in the dishwasher. I've changed out the piston and nut assembly, but this did not seem to help. I've also removed the piston assembly to make sure the rubber isn't distorted, and I've also checked the valve gasket and this also appears to be ok. Is this just a bad pump assembly?
Answer Jeff, Check to make sure that the drain hose is properly positioned where it is either going to an air gap or it is going to the bottom of the countertop before going to the drain on the disposal. If this checks ok then the pump is the most likely cause of the unit not draining completely. Read More... Answered by AppliancePartsPros.com | Friday, October 11, 2013