Why Is My Dishwasher Not Draining?

Quick answer

First, check if the dishwasher is level and the drain hose is not kinked. Ensure the drain filter is clean. If these checks don't help, you may need to inspect the drain pump or impeller. Always turn off power before starting any repairs.

Confirm the symptom

• Dishwasher leaves standing water after cycle.
• Cycle completes but dishes aren't clean.
• Dishwasher makes unusual noises during drain cycle.
• Error code related to draining on display.
• Drain hose is disconnected or damaged.
• Drain filter is clogged with food debris.

Tools and prep

• Turn off power to the dishwasher at the circuit breaker.
• Gather a screwdriver, pliers, and a bucket.
• Have a flashlight for better visibility.
• Put on gloves to protect your hands.
• Locate the water shutoff valve and turn it off.
• Place towels or a shallow pan to catch any water.

Step-by-step troubleshooting

1. Check Dishwasher Level
   Do: Use a level to ensure the dishwasher is not tilted.
   Observe: If unlevel, adjust the legs to level the dishwasher.
   Means: Water may not drain properly if the dishwasher is tilted.
   Next: Check the drain hose.
2. Inspect Drain Hose
   Do: Locate the drain hose under the sink or behind the dishwasher.
   Observe: Ensure it is not kinked, clogged, or disconnected.
   Means: A kinked or clogged hose can prevent proper draining.
   Next: Clean the drain filter.
3. Clean Drain Filter
   Do: Remove the lower rack and locate the filter at the back of the dishwasher.
   Observe: Clean the filter of any food debris or blockages.
   Means: A clogged filter can cause draining issues.
   Next: Check the air gap.
4. Check Air Gap
   Do: Locate the air gap on the kitchen counter or sink.
   Observe: Ensure it is not clogged with debris.
   Means: A clogged air gap can prevent proper draining.
   Next: Inspect the drain pump.
5. Inspect Drain Pump
   Do: Remove the lower access panel to locate the drain pump.
   Observe: Check for any blockages or damage.
   Means: A faulty drain pump can prevent water from being pumped out.
   Next: Check the drain impeller.
6. Check Drain Impeller
   Do: Locate the impeller inside the drain pump.
   Observe: Ensure it is not damaged or blocked.
   Means: A damaged impeller can prevent proper draining.
   Next: Test the drain motor.
7. Test Drain Motor
   Do: Use a multimeter to test the drain motor for continuity.
   Observe: If there is no continuity, the motor may need replacement.
   Means: A faulty motor can prevent the dishwasher from draining.
   Next: Check the control board.
8. Check Control Board
   Do: Inspect the control board for any signs of damage.
   Observe: If damaged, it may need to be replaced.
   Means: A faulty control board can cause various issues, including draining problems.
   Next: Call a professional if needed.

Common causes

Parts matching

If you need to replace any parts, ensure they match your dishwasher's make and model.

• Drain pump
• Drain impeller
• Drain motor
• Control board
• Drain hose
• Air gap kit

Always double-check the part number before purchasing replacements.

When to call a professional

• If the dishwasher is under warranty.
• If you're not comfortable performing the repairs yourself.
• If the issue persists after trying the steps above.
• If you suspect a major component failure, like the control board.
• If there are electrical issues beyond your expertise.
• If water damage is extensive or involves other appliances.

FAQ

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