Hi, thanks for using JustAnswer.com. Are you sure it is the drain pump that is running? This dishwasher uses a separate electric drain pump to evacuate the water than the wash motor. Could it be that you are hearing the wash motor but the water is siphoning out because the drain hose has no high loop? The drain hose needs to be higher than where it drains into and definitely not going through the floor or somewhere below the dishwasher to prevent siphon.