Whirlpool Sump Motor Assembly (WPW10780877)

The Whirlpool Sump Motor Assembly circulates wash water through the dishwasher during cleaning and rinsing. It mounts to the sump area at the bottom of the tub and uses an impeller and motor to move water to the spray arms, helping keep water flow steady through the wash cycle.

Common failures include motor wear, a damaged impeller, or debris that jams the pump. Seals can also wear and allow leaks into the motor area. Electrical faults in the motor windings or connections can stop the motor from starting or make it cut out during operation.

If you are troubleshooting a wash performance or water circulation issue, these symptoms can point to this part:

- Dishes come out dirty because spray arms do not spin or water flow is weak

- Dishwasher fills and drains but does not wash or circulate water

- Unusual humming, grinding, or rattling sounds from the sump area during wash

- Wash cycle stops mid-cycle or the unit shuts down when the motor tries to run

- Water leaking from the bottom center area related to the sump and motor housing

- Intermittent washing where water circulation starts and stops during the cycle