Michael B Agency , MO December 07, 2019 Appliance: Whirlpool Dishwasher WDF540PADW1 Whirlpool Dishwasher Wdf540padw1: My Whirlpool dishwasher was not draining. How to replace Drain Pump. I checked the filters and drain hose to see if they were plugged and they were not. I called AppliancePartsPros to order a new drain pump. They were very helpful and it only took a few minutes to order one. The new pump arrived in a few days. I then changed the old pump with the new one. Drains perfectly. Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes