Christopher R Wauconda , IL May 08, 2020 Appliance: General Electric Dishwasher PDW7880N10SS Ge Dishwasher Pdw7880n10ss: Water would not drain loud humming noise. How to replace Drain Pump Assembly. I replaced the pump, which was quick and easy. I found the old pump had a piece of broken plastic jammed in the impeller. Most difficult part was getting the dishwasher set back in place and attached to the underside of the granite counter tops. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes