I removed the water pump and discovered it has passages under the impeller that I assume help cool the pump. They were full of gunk. To clean I was careful to flex the plastic behind the impeller and used water pressure to clean it out. The old pump is working still but sometimes groans for a second before starting. I have a new pump on hand now because I feel I will need it. AppliancePartsPros did get my pump pkg-ed the same day but shipping still needed a week to deliver one state away.