Maytag MDB8751BWQ 24 in. Built-in Dishwasher Logo
Posted on Mar 22, 2010
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Dishwasher won't drain--Maytag Quiet Series 300

I have checked all the hoses and cleaned out all the drain areas within the dishwasher--it still won't drain at the end of cycle--l;eaving a good deal of water in the bottom of the dishwasher. How can i fix this problem?

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  • Master 1,382 Answers
  • Posted on Mar 22, 2010
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A clog in the drain line or air gap (if there is one) is the usual reason that a dishwasher won't drain. Often the problem is at the point where the drain line attaches to the garbage disposer or household drain line. If you remove this line, you can clear any debris from the hose or hose connection. Be sure to reattach the hose before starting the dishwasher again.

Many dishwashers use a drain valve with an electric solenoid. When electricity flows to the solenoid, the valve opens and diverts the water to the drain. Sometimes the solenoid, or the diverting lever, sticks and prevents the dishwasher from draining or filling properly. Try to free up the solenoid to lubricate the lever. Otherwise, you may have to replace the solenoid or pump assembly. With these systems, the motor always rotates in one direction. When it's energized, the drain valve diverts the water.

Other dishwashers simply reverse the direction of the motor to drain the dishwasher. These units don't have a drain valve. Instead, there's a drain hose connected directly to the pump housing.

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I have a maytag quiet series 300. When it is done with any of the cycles in leaves about 1-2 inches of water in the bottom of the dishwasher. I can manually hit the start button twice and it will go...

Hi jeffwirch,

I'm Harvey the Master Plumber.

Your problem is: You have a maytag quiet series 300. When it is done with any of the cycles in leaves about 1-2 inches of water in the bottom of the dishwasher. You can manually hit the start button twice and it will go through a 2 minute cycle and pump out the water. You have cleaned the filter inside the dishwasher where it drains and have checked the hose to the disposal and it pumps out fine. It just doen't pump itself at the end of the cycle.

It sounds like a bad control board. It's in the top of the door panel. I don't recomend this repair to the average homeowner. You might consider the Repair Directory to find a repairman.

Feel free contact me again!
Please give me a rating here at fixya.com before you sign off
Thank you,
Harvey your Master Plumber
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