The dishwasher will not drain after its' cycle.
Your dishwasher uses one of two ways to drain. It either opens a valve on the main pump while it's running to let it pump the water out, or it turns off the main pump and uses a smaller pump with a separate motor to drain the water. You'll know which method it uses by the sound it makes when it drains, provided it's working properly. If it sound like it's running normally when it drains, but maybe quieter, it uses the main pump motor and opens a valve to drain. If it sounds completely different than it does and sounds like a different motor running when it's draining, it's using a separate pump to drain.
If your dishwasher uses the main motor to drain, you'll need to check the drain valve to see if it can open. Pull out the dishwasher, with the power turned off, being careful not to damage the sometimes fragile water line, and find the drain valve. It'll probably be located in between the big motor the drain hose. The valve's electromagnetic operator will be on the outside of the tube where the valve is. Make sure it's connected to the wires and make sure the valve isn't blocked with gunk.
If the dishwasher uses a separate pump motor drain, pull out the dishwasher with the power off, being careful not to hurt the sometimes fragile water line, and locate the drain pump. It'll be connected between the big motor and the drain hose. You may need to disconnect one of the hoses and make sure the impeller can turn freely. It may be blocked with gunk. Make sure the wires to the pump's motor are connected properly.
You may also need to check that the wires are plugged into the dishwasher's controller properly.
If the problem is still happening and you checked either the drain valve or drain pump, it'd help to get an electrical meter, disconnect the the wires from the drain valve or pump, and check to see if you can read a voltage on those wires when the dishwasher is trying to drain. If you can read a voltage, the drain valve or pump probably needs to be replaced or repaired. If the voltage doesn't show up, the problem is in the wires or the dishwasher's controller.
If it uses a mechanical knob that rotates and controls the cycle, you need to make sure the drain wire is connected properly. You could take apart the knob timer box to and replace the switch behind the control wheel that turns the drain function on and off.
If the dishwasher uses a digital controller, with buttons and lights and stuff, Follow the drain wires to the control board in the door and make sure they're plugged in. If you see a small black, blue, gray, or white box cube on the circuit board close to where the wires connect, tap it firmly with a screwdriver. That is a switch controlled by the microprocessor that turns the drain function on and off.
Sep 20, 2009 |