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Whirlpool Dishwasher Not Draining

DU930PWSQ0

The part(s) or condition(s) listed below for the symptom Dishwasher not draining are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.

Most Frequent Causes for Dishwasher not draining

Cause 1Drain Impeller

The drain impeller pushes water through the drain hose and into the garbage disposer or drain line. If the impeller is broken, replace it.

Parts
Drain Impeller for your WhirlpoolDishwasher
Drain Impeller - Part # 4437658 Mfg Part # WP8274950

Drain impeller kit

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Cause 2Pump and Motor Assembly

The motor drives an impeller to force water out of the drain hose. If the motor runs during the drain cycle, check for a blockage in the drain line. If the motor won't run during the drain cycle or if it just hums when it should be running, the pump and motor assembly might need to be replaced.

Parts
Pump and Motor Assembly for your WhirlpoolDishwasher
Pump and Motor Assembly - Part # 2024551 Mfg Part # W10428167

Pump & motor assembly, circulation and drain are handled by this assembly

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Cause 3Clogged or Improperly Installed Garbage Disposer

If the garbage disposer was installed recently, the drain plug may not have been removed. All garbage disposers are sold with a solid plug in the drain tube. If the dishwasher is not connected to the garbage disposer, the plug must remain in the drain tube. However, if the dishwasher is connected to the garbage disposer, the plug must be removed. If the garbage disposer wasn't replaced recently, it is possible that the disposer is clogged. Remove the dishwasher drain hose from the disposer and clean out both the fitting on the disposer and the end of the drain hose. These are the most common places to find an obstruction if the dishwasher won't drain.

Cause 4Drain Hose

The drain hose might be clogged. To unclog the drain hose, remove the drain hose from both the dishwasher and the sink drain and clean it out. The drain hose is most commonly clogged near the garbage disposer or dishwasher drain branch tailpiece.

Parts
Drain Hose for your WhirlpoolDishwasher
Drain Hose - Part # 2731 Mfg Part # WP3374077

Drain hose assembly, 79 inches

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Cause 5Drain Hose

The drain hose might be clogged. To unclog the drain hose, remove the drain hose from both the dishwasher and the sink drain and clean it out. The drain hose is most commonly clogged near the garbage disposer or dishwasher drain branch tailpiece.

Parts
Drain Hose for your WhirlpoolDishwasher
Drain Hose - Part # 4433403 Mfg Part # 3385556

12 Foot dishwasher drain hose extension

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Install Help
Cause 6Check Valve

The check valve prevents water from returning to the dishwasher after it has drained. If the valve gets stuck closed, it will prevent the water from draining. If the check valve is stuck closed, try cleaning it out and then replace it if necessary.

Parts
Check Valve for your WhirlpoolDishwasher
Check Valve - Part # 2844 Mfg Part # 675238

Dishwasher check valve. This check valve prevents water from returning to the dishwasher after it has drained. If the valve gets stuck closed, it will prevent the water from draining.

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Install Help
Cause 7Check Ball

The check ball is a small plastic ball in the check valve that prevents water from returning to the dishwasher after the dishwasher has drained. If the check ball gets stuck, it will prevent water from draining through the check valve. If the check ball is stuck, try to free it.

Parts
Check Ball for your WhirlpoolDishwasher
Check Ball - Part # 480671 Mfg Part # WP302709

Check ball in pump housing

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Cause 8Check Ball

The check ball is a small plastic ball in the check valve that prevents water from returning to the dishwasher after the dishwasher has drained. If the check ball gets stuck, it will prevent water from draining through the check valve. If the check ball is stuck, try to free it.

Parts
Check Ball for your WhirlpoolDishwasher
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