Customer Questions and Answers for Drain Pump by Whirlpool

Hello BR, thank you for contacting Appliance Parts Pros. If the issue is occurring near the beginning to the middle of the cycle it is likely the water inlet valve AP6987233 or the flow sensor built into the water inlet assembly AP7175478. If this is the case check to make sure that the unit seems to be filling properly, if it does the it is the water inlet assembly, if it is not filling then it is the valve. If the issue is occurring on the back half of the cycle it will be the drain pump AP6977699, the drain check valve AP7194835 allowing backflow into the tub, or improper drain hose installation/connection to the home. Check that the drain hose installation is correct according to the unit's installation instructions. You can also check the drain check valve by disconnecting the drain hose from where it connects to the home and pouring water in it to see if the tub starts to fill. If both of those are good then it is an issue within the drain pump.