Question about Dishwashers

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My dishwasher began draining through the sink overflow this morning instead of the regular drain.

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  • pdxdelight Mar 30, 2009

    I opened the dishwasher and the door made a 'sproing' sound and then got really heavy. I figured I would need to fix a door problem, and carefully shut the machine and ran the cycle anyway. The water drained out of the overflow spout next to the faucet. I assumed it was a clogged disposal drain, and ran that, but it was clear. I am now thinking the door and drain are somehow connected. I have a Magic Chef dishwasher, unsure of the model.

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  • Master
  • 1,029 Answers

  • Check sink drain and drain hose for restrictions
  • Unjam the motor
  • Unjam the pump
  • Check the drain valve
  • Check the drive belt
  • Test the timer motor
  • If you have a brand new dishwasher or garbage disposer, check the knock out plug on the garbage disposer.
  • To access the drain hose remove the lower panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel.
    The drain hose connects to the pump and runs to the sink drain (or to the air gap on top of the sink). The pump has a second hose that recirculates the water back into the dishwasher. The drain hose is roughly 1 1/2 inches in diameter. While inspecting the drain hose, check the recirculation hose as well.If checking for blockages, disconnect the drain hose from the pump, pinch the wire clamp with pliers and slide it up the hose. Place a shallow pan beneath the pump to catch any spillage. Remove the hose from the pump; wiggling the hose may help to loosen it
  • To access the drain valve remove the lower panel located beneath the door. The panel is usually held in place with two screws either above or below the panel. It may be necessary to first open the door to the dishwasher to reach the screws over the panel, then close the door to remove the panel.
    The drain valve is typically near the motor although it can be located elsewhere. Look for a water hose running from the motor or underside of the tub. The hose should lead to the drain valve. The valve consists of the the gate arm mechanism and a solenoid (also called a coil). The gate arm allows the water to flow out of the dishwasher's tub through the drain valve. You should be able to move the gate arm up and down easily and smoothly. The gate arm also has two springs attached to it. If either of the springs is missing or damaged, they should be replaced.
    The gate arm mechanism is engaged by the drain valve solenoid. The solenoid is connected by two wires. Label the wire placement on the solenoid before disconnecting the wires. The wires are connected with slip on connectors. Firmly pull the connector off of the solenoid's terminals (do not pull on the wire). You may need to use a pair of needle-nose pliers to remove the connectors. Inspect the connectors and the terminals for corrosion. If the connectors are corroded they should be replaced

Posted on Aug 26, 2008

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1 Answer

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Look under the sink and find the point where your dishwasher connects to the main drain. Open the connection and check for a clog just below the connection point. This is the most likely cause of your problem.
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Please rate this answer if your find it helpful.

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You have a partially blocked drain - causing wastewater to flow into the dishwasher instead.

Use 1/2 a cup of caustic soda or proprietary drain cleaner down the sink drain. Add about a pint of water, and leave overnight.
Next morning pour a full boiling kettle down the drain which should move things on and clear the drain.
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