Bosch Dishwasher: not washing
What is this symptom?
If your Bosch dishwasher is running but leaving dishes dirty with food residue, spots, or film, it indicates the wash cycle isn't effectively cleaning. Common issues include clogged filters and improper loading, which can prevent optimal water flow and detergent distribution. Understanding these problems can help restore your dishwasher's performance and ensure sparkling clean dishes after every cycle.
Important Tips for Bosch Models
- Bosch recommends checking detergent use, spray arm cleaning, and proper loading for dishwashers not cleaning effectively.
- Bosch documentation notes importance of correct wash cycle and water temperature for effective detergent tablet dissolution.
Possible Causes
Clogged filters or spray arms
How to Identify: Dishes have food residue; visible debris in filter; spray arms don’t spin or holes are blocked
Part: Lower and upper filters, spray arms
Improper loading or overloading
How to Identify: Certain areas always dirty (upper or lower rack or spray arms obstructed by dishes
Part: Dish rack loading arrangement (not a part)
Incorrect detergent usage or blockage of detergent dispenser
How to Identify: Detergent not releasing, residue left from detergent, or use of wrong detergent type
Part: Detergent dispenser
Low incoming water temperature
How to Identify: Cloudy dishes or grease not removed; hot water supply below recommended ~49°C
Part: Home hot water supply
Hard water scale buildup
How to Identify: Cloudy glassware, mineral deposits on dishes, buildup on spray arms
Part: Internal water softener and spray arm holes
Faulty circulation pump or motor
How to Identify: Motor not making normal sound; no water jet force; persistent lack of cleaning after maintenance
Part: Circulation pump
DIY Solutions
Clean filters and spray arms
- Turn off dishwasher and remove bottom rack.
- Remove and clean the filters at the sump, rinsing under water and brushing debris.
- Remove spray arms (if removable) and clear holes with a toothpick or brush.
- Reinstall filters and spray arms securely and run a rinse cycle.
- Check for improved cleaning performance.
Adjust loading and detergent use
- Load dishes without blocking spray arm rotation.
- Place plates facing the center, cups upside down, and avoid nesting.
- Ensure detergent dispenser is not blocked by dishes.
- Use recommended detergent type and appropriate amount.
Increase water temperature
- Check hot water temperature at the sink nearest the dishwasher.
- Adjust home water heater thermostat to around 120°F if below recommended level.
- Run a cycle on a hot setting to test improvement.
Professional Repairs
Replace circulation pump or motor assembly
Service or replace faulty detergent dispenser
When to Call a Professional
Preventive Maintenance
-
Clean filters and spray arms: Clogs that reduce cleaning performance
Frequency: monthly -
Run hot maintenance cycles: Build up of grease and deposits that reduce cleaning efficiency
Frequency: monthly
Frequently Asked Questions
Why is my Bosch Dishwasher not washing?
How do I fix Bosch Dishwasher not washing myself?
How much does it cost to fix not washing?
When should I call a technician for not washing?
References & Sources
Community Analytical Insights
Analysis based on real user discussions from appliance repair communities
Can I Fix This Myself?
Common Issues Reported by Users
- Wash pump/motor failure (2 mentions)
- Insufficient water filling (intake valve issue) (1 mentions)
- Clogged filter or impeller (1 mentions)
User Suggested Solutions
-
Clean the filter and impeller, then unplug the machine to dry
-
Check and replace the drain pump or circulation pump; inspect control board
-
Replace the intake valve to ensure proper water filling
-
Replace the impeller if broken
-
Inspect for wash pump/motor failure
Analysis based on 5 community discussions
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
Community Discussions
dishwashing pod does not disintegrate, top rack not getting washed
Replaced the intake valve after confirming it was not filling with water properly.
not washing properly, weak spray from arms
impeller broken, needs replacement
hums but does not wash
After cleaning the filter and impeller, unplugging the machine for a week and letting it dry, the machine worked again.
not washing/rinsing
Check the drain pump and circulation pump; if the wash pump is not getting power, the control board may be the issue.
Dishwasher not washing properly
Possible wash pump/motor failure causing incomplete washing.
Source: Reddit r/appliancerepair
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