The 3 most common part(s) or condition(s) which cause the symptom Dishwasher leaking are listed below starting with the most likely. Check or test each item and watch any available videos.
RepairClinic Item # 3015273
If the dishwasher is leaking water the water inlet valve might be defective. If the water inlet valve sticks open, it will allow water to fill the dishwasher continuously. Some customers report that they see clean water filling the bottom of the dishwasher after it's been sitting all night or for a couple of days. If this happens, turn off the water that is supplying the dishwasher. This is normally a valve under the kitchen sink. Then, replace the water inlet valve, it cannot be repaired. The water valve needs at least 20 lbs pressure to shut off properly. If your water pressure is to low replacing the valve may not solve the problem.
RepairClinic Item # 1422871
If the dishwasher is leaking water the lower wash arm assembly might be defective. If the lower wash arm has a crack or split on the end, it can force water to spray directly toward the lower part of the dishwasher door. Then, the water can be forced under the door and onto the floor. Check the lower wash arm for any cracks or splits and replace it if necessary. Also make sure the screws are tight in the wash arm support. If the screws are loose, water can spray out the side of the pump and cause a leak.
RepairClinic Item # 1447640
Every dishwasher door has a door seal. If the dishwasher is leaking water, it might be that the door seal is defective or worn out. Try closing the dishwasher door on a dollar bill and see if the door seal is making good contact all the way around the door. If not, replace the door seal.