My Dishwasher Is Making a Loud Noise

Quick answer

A loud dishwasher noise is often caused by a loose component or clogged filter. Turn off the power, check for loose parts, and clean the filter. If the noise persists, inspect the pump or motor.

Confirm the symptom

• Hearing a loud, unusual noise during operation
• Noise occurs during the wash or drain cycle
• Noise is consistent or intermittent

Tools and prep

• Screwdriver set
• Adjustable wrench
• Flashlight
• Work gloves
• Plastic putty knife
• Turn off power at the circuit breaker
• Place a towel under the dishwasher to catch leaks

Step-by-step troubleshooting

1. Check for Loose Components
   Do: Open the dishwasher and look for loose racks, dishes, or internal parts.
   Observe: Any loose or vibrating parts?
   Means: Loose parts can cause rattling or clanking noises.
   Next: Secure or remove loose items and test the dishwasher.
2. Clean the Filter
   Do: Locate and remove the filter at the bottom of the dishwasher. Rinse it under running water to remove debris.
   Observe: Filter is clogged with food particles or debris.
   Means: A clogged filter can cause the pump to work harder, creating noise.
   Next: Reinstall the clean filter and run a test cycle.
3. Inspect the Pump
   Do: Check the pump area for obstructions or damage. Use a flashlight to look for foreign objects.
   Observe: Obstruction or damaged pump components.
   Means: A blocked or faulty pump can create loud humming or grinding noises.
   Next: Remove obstructions or replace the pump if damaged.
4. Check the Motor
   Do: Listen for unusual motor sounds when the dishwasher is running. Ensure the motor is not overheating.
   Observe: Loud humming, grinding, or burning smell from the motor.
   Means: A failing motor may need to be replaced.
   Next: If the motor is faulty, consider replacing it or calling a professional.
5. Test the Water Inlet Valve
   Do: Check the water inlet valve for mineral buildup or damage. Clean or replace if necessary.
   Observe: Mineral deposits or cracks in the valve.
   Means: A faulty valve can cause loud noises during water intake.
   Next: Clean or replace the valve and test the dishwasher.
6. Examine the Spray Arms
   Do: Inspect the spray arms for clogs or damage. Use a toothpick to clear any blocked nozzles.
   Observe: Clogged or damaged spray arm nozzles.
   Means: Clogged spray arms can cause uneven water flow and noise.
   Next: Clean or replace the spray arms and run a test cycle.

Common causes

Parts matching

If you need to replace parts, look for these common components:

• Dishwasher Filter
• Dishwasher Pump
• Dishwasher Motor
• Spray Arms
• Water Inlet Valve

Check your dishwasher’s model number for the correct replacement parts.

When to call a professional

• The noise persists after cleaning and checking all components
• You smell burning or see sparks from the motor
• The dishwasher leaks water after inspection
• You hear a loud grinding noise that indicates internal damage
• You are unsure about electrical repairs or motor replacement

FAQ

Related guides

• dishwasher not draining properly
• dishwasher making grinding noise

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