Bosch Dishwasher: drain pump error, water not draining
What is this symptom?
Experiencing a Bosch dishwasher drain pump error with water not draining? This issue often results in water pooling at the bottom, preventing your dishwasher from completing its cycle. Common causes include a clogged filter assembly or debris in the pump area, which can lead to frustrating wash results.
Important Tips for Bosch Models
- Bosch intentionally leaves ~1 cup of water in sump as water seal; deep standing water indicates an issue
Possible Causes
Clogged filter assembly or debris in pump area
How to Identify: Water remains at bottom, visible debris when inspecting filter; water does not drain even though pump tries to run
Part: Filter and sump/pump inlet
Air gap or high loop obstruction
How to Identify: Water backs up into dishwasher, may pool in sink, obstruction visible at air gap if installed
Part: Air gap assembly or drain routing
DIY Solutions
Clean filter and pump area
- Turn off dishwasher and remove bottom rack
- Twist and remove the filter assembly at the bottom
- Rinse filters under running water and scrub with brush
- Remove debris in pump inlet and sump with a sponge
- Reassemble filter and run drain cycle
Check and clear drain hose
- Disconnect power and pull dishwasher to access back
- Locate drain hose from pump to sink drain
- Inspect for kinks or visible blockages
- Disconnect hose at sink/disposal and flush with water into bucket
- Reattach hose securely and test drain
Inspect and clear drain pump impeller
- Disconnect power
- Remove lower access panel
- Access and remove debris from drain pump impeller area
- Ensure impeller spins freely
- Reassemble and test dishwasher
Clear air gap (if present)
- Locate air gap on sink
- Remove cap
- Clear any debris inside
- Replace cap and run dishwasher
Next step
Choose the next step for drain pump error, water not draining
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Drain Hose
Carries waste water from the drain pump to your home's standpipe or sink drain.
- Typical part-only price
- $15 - $30
- DIY difficulty
- Easy
- Estimated time
- 15-30 mins
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.
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.
Drain Pump
Pumps waste water out of the appliance during the drain cycle.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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.
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.
Braided Dishwasher Inlet Hose
For replacement of an externally damaged supply hose. Verify connection size, length, and appliance installation requirements before ordering.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Professional Repairs
Replace drain pump assembly
Replace drain hose
Repair or replace control board (rare)
When to Call a Professional
Preventive Maintenance
-
Clean filter assembly: Filter clogs and blockage-related drainage issues
Frequency: monthly -
Inspect drain hose routing: Hose kinks and blockages
Frequency: annually
Frequently Asked Questions
Why is my Bosch Dishwasher drain pump error, water not draining?
How do I fix Bosch Dishwasher drain pump error, water not draining myself?
How much does it cost to fix drain pump error, water not draining?
When should I call a technician for drain pump error, water not draining?
References & Sources
Community Analytical Insights
Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions
Common Issues Reported by Users
- Clogged drain filter or hose
- Faulty drain pump
- Blocked or kinked drain hose
- Malfunctioning float switch
- Electrical issue with the control board
User Suggested Solutions
-
Check and clean the drain filter and hose. Disconnect the dishwasher, remove the filter, and clean it under running water. Inspect the drain hose for clogs and clear them if necessary.
-
Inspect the drain pump for blockages. Remove the pump cover and check for debris or obstructions. If the pump is damaged, it may need to be replaced.
-
Check the drain hose for kinks or blockages. Ensure the hose is properly positioned and not bent or pinched, which can restrict water flow.
-
Test the float switch for proper operation. Remove the float and clean any debris. If the float is stuck, it may prevent the dishwasher from draining.
-
Inspect the control board for electrical issues. If there are signs of damage or burnt components, professional repair may be necessary.
Limited-source guidance; percentages and success-rate claims are not shown
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
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