Bosch Dishwasher: making noise

Professional Repair Guide

What is this symptom?

Is your Bosch dishwasher making loud, grinding, or buzzing noises during operation? These abnormal sounds can indicate obstructions or issues with the pump or spray arms. Understanding the noises can help pinpoint the problem, whether it's during washing, draining, or filling phases. Don't let these disruptive sounds go unchecked; addressing them promptly can save you from costly repairs.

Urgency: Medium

Important Tips for Bosch Models

  • Bosch dishwashers make beeping sounds at end of cycle normally; loud buzzing during drain may indicate drain pump blockage.

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.

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

Community Analytical Insights

Analysis based on real user discussions from appliance repair communities

Can I Fix This Myself?

100%
DIY Success Rate Difficulty: Either

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.

    Success rate: 50.0%

  2. Replace drain pump if faulty.

    Success rate: 0.0%
Analysis based on 2 community discussions
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Bosch 800 series dishwasher dry noise
  2. Bosch 500 dishwasher, a few years old, now loud

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

User Comments (0)

Share your experience or solution below.

Be the first to comment!