Dishwasher Making Loud Whining Noise

Quick answer

A loud whining noise from your dishwasher often points to a motor or pump issue. Start by checking for obstructions in the drain pump and ensuring the unit is level. If the noise persists, the motor may need replacement.

Confirm the symptom

• Hearing a high-pitched whining noise during operation
• Noise occurs during the wash or drain cycle
• The noise is continuous or increases over time

Tools and prep

• Screwdrivers (flathead and Phillips)
• Flashlight
• Rubber gloves
• Bucket (for potential water spillage)
• Owner's manual
• Turn off power at the circuit breaker

Step-by-step troubleshooting

1. Check for Obstructions
   Do: Remove the lower rack and inspect the drain pump area for food particles or debris.
   Observe: Look for any visible blockages or clogs.
   Means: A clogged drain pump can cause strain on the motor, leading to a whining noise.
   Next: If debris is found, clean it out and restart the dishwasher.
2. Inspect the Motor
   Do: Listen closely to determine if the noise is coming from the motor or pump area.
   Observe: A loud, continuous whine from the motor may indicate a failing component.
   Means: A worn or failing motor can produce a high-pitched noise due to internal wear.
   Next: If the motor is the source, consider replacing it.
3. Check the Dishwasher Level
   Do: Ensure the dishwasher is level by placing a spirit level on the surface.
   Observe: If the unit is tilted, the motor and pump may work harder, causing noise.
   Means: An unlevel dishwasher can lead to mechanical strain and unusual noises.
   Next: Adjust the leveling feet as needed and test the dishwasher again.
4. Test the Pump
   Do: Unplug the dishwasher and inspect the pump for signs of damage or wear.
   Observe: Look for cracks, leaks, or worn bearings in the pump.
   Means: A damaged pump can cause excessive noise during operation.
   Next: Replace the pump if any damage is found.
5. Examine the Drive Belt
   Do: Locate the drive belt (if your model has one) and check for looseness or wear.
   Observe: A loose or worn belt can cause slipping and a high-pitched noise.
   Means: A properly tensioned belt ensures smooth motor operation.
   Next: Tighten or replace the belt if necessary.
6. Check for Loose Components
   Do: Inspect all internal components for loose screws or parts.
   Observe: Any vibrating or loose parts can amplify noise during operation.
   Means: Secure all components to reduce noise and prevent further damage.
   Next: Tighten any loose parts and test the dishwasher again.

Common causes

Parts matching

Common parts needed for a dishwasher making a loud whining noise include:

• Drain pump cleaning kit
• Dishwasher motor
• Dishwasher pump
• Adjustable leveling feet
• Drive belt
• Screws or fasteners

Always refer to your dishwasher's owner's manual for specific part numbers and compatibility.

When to call a professional

• The noise persists after cleaning the drain pump and checking for obstructions
• You suspect a failing motor or damaged pump but lack the tools or experience to replace them
• The dishwasher is not level and adjusting the feet does not resolve the issue
• You hear a burning smell or notice electrical sparks
• The dishwasher leaks water or fails to drain properly after troubleshooting

FAQ

Related guides

• dishwasher making grinding noise
• dishwasher not draining properly
• dishwasher making rattling noise
• dishwasher making buzzing noise

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