Why Is My Kenmore Dishwasher Making Noise (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

A noisy Kenmore dishwasher is often caused by a loose component, trapped debris, or a faulty pump. Turn off the power, check for loose parts, and clean the filter to resolve the issue quickly.

Confirm the symptom

Hearing loud grinding, rattling, or humming during operation
Noise occurs only during the wash or drain cycle
Sound is coming from the bottom or back of the unit

Tools and prep

Screwdriver set
Flashlight
Plastic putty knife
Bucket (for water collection)
Work gloves
Turn off power at the circuit breaker
Turn off water supply to the dishwasher

Step-by-step troubleshooting

Check for Loose Components
Do: Open the dishwasher and inspect for loose racks, dishes, or internal parts.
Observe: Any loose items vibrating or rattling during operation.
Means: Loose parts are causing the noise.
Next: Secure or remove loose items and test the dishwasher.
Inspect the Filter and Drain
Do: Locate and remove the filter at the bottom of the dishwasher. Clean it thoroughly with a brush and water.
Observe: Debris or buildup in the filter or drain area.
Means: Clogged filter is causing noise or poor drainage.
Next: Reinstall the filter and run a test cycle.
Examine the Pump and Motor
Do: Visually inspect the pump and motor for signs of damage or wear.
Observe: Unusual wear, cracks, or grinding sounds from the pump.
Means: Faulty pump or motor is causing the noise.
Next: Consider replacing the pump or motor if damaged.
Check the Spray Arms
Do: Remove the spray arms and inspect for clogs or damage.
Observe: Clogged holes or damaged spray arm joints.
Means: Clogged or loose spray arms can cause noise.
Next: Clean the spray arms and ensure they rotate freely.
Test the Dishwasher
Do: After completing previous steps, run a short cycle to see if the noise persists.
Observe: Noise is gone or reduced significantly.
Means: Issue was resolved with cleaning or adjustments.
Next: Monitor performance over the next few cycles.
Inspect the Door Seal
Do: Check the door gasket for debris or damage.
Observe: Cracks, tears, or trapped objects in the seal.
Means: Damaged or dirty seal may contribute to noise.
Next: Clean or replace the door seal as needed.

Common causes

Cause	Likelihood	Difficulty	Part often needed
Loose or vibrating parts Loose racks, dishes, or internal components can vibrate and create noise during operation.	Common	Easy	None
Clogged filter or drain Debris in the filter or drain can cause unusual sounds and poor water flow.	Common	Easy	None
Faulty pump or motor A worn or damaged pump/motor can produce grinding or humming noises.	Sometimes	Medium	Pump or motor assembly
Clogged spray arms Blocked spray arm nozzles can cause uneven water flow and noise.	Common	Easy	None
Worn door seal A damaged or dirty door seal can cause vibrations or rattling.	Sometimes	Easy	Door gasket
Air trapped in the system Air pockets in the water lines can cause knocking or hammering sounds.	Rare	Medium	Water inlet valve

Parts matching

If you need to replace parts, match these common issues to the right components:

Loose spray arm nozzles → Clean nozzles with a toothpick or brush
Worn pump/motor → Replace the pump or motor assembly
Clogged filter → Clean the filter (no replacement needed in most cases)
Damaged door seal → Replace the door gasket

Always purchase genuine Kenmore parts for compatibility and performance.

When to call a professional

Noise persists after cleaning and tightening all components
You hear a burning smell or electrical sparking
The dishwasher leaks water or fails to drain
You suspect a damaged motor or pump but lack the tools to replace it
The unit is under warranty and you don’t want to risk voiding it

FAQ

Why does my dishwasher make noise only during the drain cycle?

This is often caused by a clogged filter or drain pump. Clean the filter and inspect the drain pump for debris or damage.

Can a clogged spray arm cause a loud noise?

Yes, clogged spray arms can cause uneven water flow and rattling. Clean the nozzles with a toothpick or brush.

How do I know if the pump is faulty?

A faulty pump often makes grinding or humming noises and may prevent proper drainage. If cleaning doesn’t help, the pump likely needs replacement.

Is it safe to use the dishwasher if it’s making noise?

It’s generally safe for short-term use, but prolonged operation with a faulty component can cause further damage. Address the issue as soon as possible.