Samsung Dishwasher Making Grinding Noise

Quick answer

A grinding noise in your Samsung dishwasher is often caused by a trapped object in the pump or a failing motor. Turn off the power, check the pump for debris, and inspect the motor for damage.

Confirm the symptom

• Grinding noise during the drain or wash cycle
• Noise is loud and consistent
• Noise occurs even when the dishwasher is empty

Tools and prep

• Screwdriver set
• Flashlight
• Infrared thermometer
• Shop vacuum or soft brush
• Multimeter
• Socket set

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Prep & safety

• Unplug the dishwasher or turn off the circuit breaker to ensure safety.
• Wear protective gloves to avoid cuts from sharp objects.

Step-by-step troubleshooting

1. Check for Obstructions
   Do: Visually inspect the pump and drain area for any trapped objects like utensils or food particles.
   Observe: You may see a foreign object lodged in the pump or drain.
   Means: The object is causing the grinding noise.
   Next: Remove the object and test the dishwasher.
2. Inspect the Pump Assembly
   Do: Remove the lower rack and check the pump for damage or wear.
   Observe: The pump may have cracks, debris, or a damaged impeller.
   Means: The pump is faulty and needs replacement.
   Next: Replace the pump assembly if damaged.
3. Test the Motor
   Do: Use a multimeter to test the motor's continuity and resistance.
   Observe: The motor may show no continuity or resistance outside the manufacturer's specifications.
   Means: The motor is failing and needs replacement.
   Next: Replace the motor.
4. Check the Motor Bearings
   Do: Manually rotate the motor shaft to check for smooth movement.
   Observe: The motor shaft may be stiff or make a grinding sound when rotated.
   Means: Worn motor bearings are causing the noise.
   Next: Replace the motor.
5. Inspect the Drive Belt
   Do: Check the drive belt for signs of wear, cracking, or looseness.
   Observe: The drive belt may be damaged or not properly tensioned.
   Means: A faulty drive belt can cause grinding noises.
   Next: Replace or adjust the drive belt.
6. Clean the Filter
   Do: Remove and clean the dishwasher's filter to eliminate any debris.
   Observe: The filter may be clogged with food particles or debris.
   Means: A clogged filter can contribute to noise issues.
   Next: Reinstall the clean filter and test the dishwasher.
7. Check the Drain Hose
   Do: Inspect the drain hose for kinks, clogs, or damage.
   Observe: The drain hose may be blocked or damaged.
   Means: A clogged or damaged drain hose can cause noise.
   Next: Clear the clog or replace the hose.
8. Test the Dishwasher
   Do: Plug the dishwasher back in and run a test cycle to see if the noise persists.
   Observe: The grinding noise may or may not return.
   Means: The issue may be resolved or further diagnosis is needed.
   Next: If the noise persists, consider calling a professional.

Common causes

Parts you might need

When replacing parts, ensure compatibility with your Samsung dishwasher model.

• Pump Assembly: match the model number and specifications from the old pump.
• Motor: match the voltage, amperage, and RPM of the old motor.
• Drive Belt: match the length and type of the original belt.
• Drain Hose: match the diameter and connection type of the existing hose.

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Consult the dishwasher's user manual for specific part numbers and installation instructions.

When to call a professional

• The grinding noise persists after checking all components.
• You are unable to locate or access the pump or motor.
• You are unsure about electrical testing or replacement procedures.
• The dishwasher is still under warranty and you don't want to risk voiding it.

FAQ