To fix a dishwasher that doesn't drain, check and remove clogs from the sump, latch the unlatched door, unblock the garbage disposer and drain hose, and replace any faulty parts of the washer. Use the owner's manual to locate the various components of the dishwasher.Continue Reading
Remove any excess water from the sump with a container. Clear the food debris or other objects blocking the drain, and latch the door to facilitate drainage. Run the water, and see if it drains.
Run the disposer with water to dislodge any debris and food build-up that blocks the disposer. Remove the clamps attaching the hose to the drain valve and disposer, pull out the drain hose, and clear any blockage from the hose. Put back the hose, and tighten the clamps. Replace the drain hose if you are unable to clear the blockage.
Switch on the washer, and listen for a hum. If you hear a humming sound, remove the motor, and replace it with a new one. Replace any other malfunctioning components, including the drain valve, pump, broken belt drive and solenoid assembly. If needed, clean the air gap, and then turn on and test the washer.