Theresa D Vienna , VA January 07, 2018 Appliance: Maytag Dishwasher MDBH940AWS Maytag Dishwasher Mdbh940aws: Dishes weren't being cleaned well. How to replace Wash Impeller (Circulation Pump). Replaced wash impeller/accumulator and fished out pieces of plastic and glass in bottom of Dishwasher Everything works great, but unfortunately, dishes are till not being cleaned. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes