Bosch Dishwasher: making noise

Possible Causes

Foreign objects (utensils, debris) obstructing pump or spray arms

How to Identify: Grinding or rattling early in cycle; found objects near lower filter, spray arms, or pump area upon inspection

Part: Spray arms, filters, pump inlet

DIY Solutions

Clear foreign objects and clean filters

Easy 10-20 minutes

Tools Needed: gloves, towel, screwdriver (if needed)

1. Turn off and disconnect power to dishwasher.
2. Remove lower rack and access filter at the bottom of the tub.
3. Remove and rinse filter and check for debris; clear any objects.
4. Inspect spray arms and pump inlet for small foreign items and clean.
5. Reassemble components and test run.

⚠️ Safety First: Disconnect power before accessing internal areas.

Adjust dish loading to prevent spray arm contact

Easy 5-10 minutes

1. Pause dishwasher if operating or open door when safe.
2. Ensure dishes and utensils do not touch spray arms and are evenly spaced.
3. Avoid tall items blocking rotating arms.
4. Restart dishwasher and check if noise persists.

Clean spray arms and nozzles

Moderate 15-30 minutes

Tools Needed: toothpick or small brush, warm water

1. Remove spray arms per manual instructions.
2. Rinse spray arms and clear debris from nozzles with a brush or toothpick.
3. Reinstall and ensure free rotation.
4. Test cycle to verify noise reduction.

⚠️ Safety First: Ensure the dishwasher is powered off.

Next step

Choose the next step for making noise

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Spray Arm

Rotates and sprays high-pressure water to clean dishes inside the tub.

Typical part-only price

$20 - $55

DIY difficulty

Easy

Estimated time

5-10 mins

Optional: enter your model number

Apply

Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Model number required

Model-compatible Dishwasher parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

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Optional routine care

Maintenance supplies

These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.

Maintenance supply

Dishwasher Cleaner and Descaler

Supports routine removal of mineral scale, grease, and odor. It is maintenance, not a repair for a failed pump, valve, or control.

View maintenance supply

Maintenance supply

Braided Dishwasher Inlet Hose

For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.

View maintenance supply

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.

Professional Repairs

Circulation or Drain Pump Replacement

Estimated Cost: $150 - $400

Motor or Motor Bearing Replacement

Estimated Cost: $200 - $600

When to Call a Professional

Grinding or buzzing noise persists after clearing debris and load adjustment

Noise accompanied by poor dishwasher performance (e.g., not draining)

Internal pump or motor component damage suspected

Preventive Maintenance

• Clean filter and spray arms: Noise from debris blockage and improves water flow
  Frequency: monthly
• Check for foreign objects before running: Noise from lodged items and possible pump damage
  Frequency: each load

Frequently Asked Questions

Why is my Bosch Dishwasher making noise?

Common causes include foreign objects obstructing the pump or spray arms, leading to loud grinding or buzzing sounds.

How do I fix Bosch Dishwasher making noise myself?

Turn off the power, clear foreign objects, clean the filters, and adjust dish loading to prevent spray arm contact.

How much does it cost to fix making noise?

Professional repairs can range from $150 to $600, depending on whether the pump or motor needs replacement.

When should I call a technician for making noise?

If DIY solutions don’t resolve the issue or if the noise persists, it's advisable to contact a technician for further diagnosis.

References & Sources

• Bosch Dishwasher Noise FAQ Official
• Bosch Dishwasher making noise troubleshooting (UK Bosch support) Community
• Bosch Dishwasher Making Noise Causes & Solutions Repair-Blog

Common Issues Reported by Users

• Debris in the fan (1 mentions)
• Faulty drain pump (1 mentions)

User Suggested Solutions

1. Check for debris in the fan by removing the air duct and grey cap inside the tub.

2. Replace drain pump if faulty.

Community Discussions

rumbling/tumbling noise during Crystal Dry cycle

Check for debris in the fan by removing the air duct and grey cap inside the tub.

DIY View on Reddit →

Source: Reddit r/appliancerepair