Dishwasher Won't Empty Water (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

Turn off the power and water supply. Check the drain hose for clogs, clean the filter, and ensure the pump is working. If the issue persists, a faulty pump or drain valve may need replacement.

Confirm the symptom

Water remains in the dishwasher after a cycle
Dishes are still wet at the end of the cycle
Dishwasher makes gurgling or bubbling sounds during drain phase
Standing water visible in the bottom of the unit

Tools and prep

Screwdriver (flathead and Phillips)
Plunger (toilet plunger)
Bucket
Flashlight
Rubber gloves
Plumber's putty or silicone sealant
Owner's manual
Turn off power at the circuit breaker or unplug the unit
Shut off the water supply valve

Step-by-step troubleshooting

Check Drain Hose for Clogs
Do: Locate the drain hose and inspect it for kinks or blockages.
Observe: Hose is clear and free of kinks.
Means: Clogged or kinked hose is not the issue.
Next: Proceed to Step 2.
Clean the Filter
Do: Remove and clean the dishwasher filter under the bottom rack.
Observe: Filter is free of debris and food particles.
Means: Clogged filter is resolved.
Next: Proceed to Step 3.
Inspect the Drain Pump
Do: Listen for the drain pump to activate during a cycle. Check for unusual noises or vibrations.
Observe: Pump runs smoothly without noise.
Means: Pump is functioning correctly.
Next: Proceed to Step 4.
Test the Drain Valve
Do: Check the drain valve for debris or damage. Clean or replace if necessary.
Observe: Valve opens freely and allows water to drain.
Means: Valve is working properly.
Next: Proceed to Step 5.
Check Air Gap (if applicable)
Do: Inspect the air gap on the countertop for clogs and clean it if needed.
Observe: Air gap is clear and allows water to pass through.
Means: Air gap is not the cause.
Next: Proceed to Step 6.
Verify Drain Line Installation
Do: Ensure the drain hose is properly connected and not too high or low.
Observe: Hose is correctly installed with no siphoning issues.
Means: Improper installation is resolved.
Next: Complete.
Run a Test Cycle
Do: Restart the dishwasher and run a test cycle to see if water drains properly.
Observe: Water drains completely and dishes are dry.
Means: Issue is resolved.
Next: Complete.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Clogged Drain Hose Food particles or debris block the hose, preventing proper drainage.	Common	Easy	None
Clogged Filter A dirty filter restricts water flow and prevents the pump from draining effectively.	Common	Easy	None
Faulty Drain Pump A worn or damaged pump cannot push water out of the dishwasher.	Sometimes	Medium	Drain Pump
Clogged Drain Valve Debris or mineral buildup in the drain valve stops water from flowing out.	Sometimes	Medium	Drain Valve
Improper Drain Hose Installation Incorrect positioning of the hose can cause siphoning or blockage.	Sometimes	Easy–Medium	None
Clogged Air Gap An air gap prevents backflow but can become clogged, hindering drainage.	Rare	Easy	None
Faulty Water Inlet Valve A malfunctioning valve can cause water to remain in the unit.	Rare	Hard	Water Inlet Valve

Parts matching

If replacement parts are needed, match your dishwasher model to the correct components:

Drain Pump: Look for model-specific replacements in the owner's manual.
Drain Valve: Ensure compatibility with your dishwasher's make and model.
Water Inlet Valve: Verify voltage and connection type before purchasing.
Use a parts website or contact the manufacturer for accurate replacements.
Double-check part numbers to avoid incorrect purchases.

Always refer to the owner's manual for part numbers and compatibility.

When to call a professional

Water continues to remain in the dishwasher after following all troubleshooting steps
You hear loud noises or vibrations from the drain pump
You suspect electrical issues or need to replace complex components like the drain pump or water inlet valve
The dishwasher is under warranty and you don't want to risk voiding it by attempting repairs yourself
You're unsure about performing electrical or plumbing repairs safely

FAQ

How often should I clean my dishwasher filter?

Clean the filter every 1–2 months to prevent clogs and maintain performance.

Can I use a drain cleaner on my dishwasher?

Avoid using chemical drain cleaners as they can damage the dishwasher's components. Use hot water and a plunger instead.

Why is my dishwasher making a gurgling noise during the drain cycle?

Gurgling sounds often indicate a clogged drain hose or air gap, preventing proper water flow.

What is an air gap, and do I need one?

An air gap is a device that prevents backflow of water into the dishwasher. It is required in some regions for plumbing codes.

Can a high water pressure cause drainage issues?

Yes, excessive water pressure can lead to siphoning or improper drainage. Install a pressure regulator if needed.