Dishwasher Not Emptying: Troubleshooting Guide (Troubleshooting Guide)

On this page

Quick answer
Confirm the symptom
Tools and prep
Step-by-step troubleshooting
Common causes table
Parts matching
When to call a pro
FAQ
Related guides

Quick answer

First, check if the dishwasher is level and the drain hose is not kinked. Ensure the filter is clean. If these are fine, you may need to check the drain pump or motor. Always ensure the dishwasher is unplugged or the circuit breaker is off before starting any repairs.

Confirm the symptom

Water remains in the dishwasher after the cycle ends.
Dishes are not clean due to standing water.
Dishwasher makes unusual noises during the drain cycle.
Error codes related to draining appear on the control panel.

Tools and prep

Screwdriver (Phillips and flathead)
Pliers
Bucket
Towels
Flashlight
Owner's manual
Turn off power and water supply to the dishwasher.

Step-by-step troubleshooting

Check the Drain Filter
Do: Locate the filter at the back of the dishwasher's bottom rack.
Observe: Remove and clean the filter to ensure it's not clogged.
Means: If the filter is clogged, clean it and run a test cycle.
Next: Check the drain hose.
Inspect the Drain Hose
Do: Locate the drain hose under the sink or behind the dishwasher.
Observe: Ensure it's not kinked or clogged.
Means: Straighten any kinks and clear any blockages.
Next: Check the air gap.
Check the Air Gap
Do: Locate the air gap on the countertop or sink.
Observe: Remove the cap and clean out any debris.
Means: If the air gap is clogged, clean it and run a test cycle.
Next: Inspect the drain pump.
Inspect the Drain Pump
Do: Access the drain pump, usually located at the bottom of the dishwasher.
Observe: Check for any blockages or damage.
Means: Clear any blockages or replace the pump if damaged.
Next: Check the motor.
Check the Motor
Do: Locate the motor, often near the drain pump.
Observe: Listen for unusual noises and check for proper operation.
Means: If the motor is faulty, it may need replacement.
Next: Check the control board.
Inspect the Control Board
Do: Locate the control board, usually behind the control panel.
Observe: Look for any signs of damage or burnt components.
Means: If the control board is faulty, it may need replacement.
Next: Test the dishwasher.
Test the Dishwasher
Do: Reassemble any components you removed.
Observe: Run a test cycle to see if the issue is resolved.
Means: If the dishwasher is still not emptying, consider calling a professional.
Next: N/A

Common causes

Cause	Likelihood	Difficulty	Part often needed
Clogged Drain Filter Food particles and debris can clog the filter, preventing water from draining.	Common	Easy	None
Kinked or Clogged Drain Hose A kinked or clogged hose can restrict water flow, causing drainage issues.	Sometimes	Easy–Medium	None
Clogged Air Gap Debris can accumulate in the air gap, preventing proper drainage.	Sometimes	Easy	None
Faulty Drain Pump The drain pump may fail due to wear and tear or blockages.	Sometimes	Medium	Drain Pump
Defective Motor The motor may not be functioning properly, affecting the drain cycle.	Rare	Hard	Motor
Malfunctioning Control Board The control board may have issues that affect the drain cycle.	Rare	Hard	Control Board
Leveling Issues If the dishwasher is not level, water may not drain properly.	Sometimes	Easy	None

Parts matching

If you've identified a faulty part, here are some tips for finding the right replacement.

Check the model number of your dishwasher to ensure compatibility.
Look for parts with good reviews and warranties.
Consider buying from reputable manufacturers or authorized dealers.
Compare prices from different sources to get the best deal.
Ensure the part matches the original specifications.

Always double-check the part number and compatibility before purchasing.

When to call a professional

If the dishwasher is still not emptying after troubleshooting.
If you're not comfortable working with electrical components.
If the dishwasher is under warranty.
If you suspect a gas leak or other dangerous issue.
If you need a professional diagnosis.
If the dishwasher is making unusual noises or smells.

FAQ

Why is my dishwasher not emptying but making noise?

This could indicate a clogged drain filter, drain hose, or air gap. It could also be a faulty drain pump or motor.

Can I use chemical drain cleaners in my dishwasher?

No, chemical drain cleaners can damage the dishwasher's components. Stick to manual cleaning methods.

How often should I clean the dishwasher filter?

It's a good idea to clean the dishwasher filter every 3-6 months to prevent clogs and ensure proper drainage.