Blomberg Dishwasher Error E21
⚡ Quick Answer: The Blomberg Dishwasher E21 error code indicates a potential drainage issue, often accompanied by a humming sound and the display showing a water symb... ✅ DIY Fixable
What Does Error E21 Mean?
The Blomberg Dishwasher E21 error code indicates a potential drainage issue, often accompanied by a humming sound and the display showing a water symbol. This error typically suggests that the appliance is unable to drain water properly, which may require troubleshooting steps to resolve.
Common Symptoms:
- Error code E21 displayed on dishwasher control panel
Possible Causes
- Clogged drain filter
- Faulty drain pump
- Blocked drain hose
How to Fix Error E21
DIY Fix Verify Code and Reset Dishwasher
- Confirm the error code displayed is E21 and typed correctly.
- Disconnect power by unplugging or switching off the breaker for 5–10 minutes.
- Reconnect power and restart a wash cycle to see if the error clears.
Technician Only Consult Official Blomberg Documentation and Support
- Obtain the specific service manual or technical documentation for your exact Blomberg dishwasher model from Blomberg support or manuals page.
- Search the troubleshooting section for any mention of E21 or contact Blomberg technical support with the model and code.
- If the error code persists after a basic reset and user-level checks
- If any internal components (pumps, wiring) seem damaged or you are unsure
Next step
Choose the next step for E21
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 Pump
Pumps waste water out of the appliance during the drain cycle.
- Typical part-only price
- $35 - $80
- 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 Hose
Carries waste water from the drain pump to your home's standpipe or sink drain.
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.
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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.
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.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does E21 error mean on Blomberg Dishwasher?
E21 indicates a drainage issue, often with a humming sound and water symbol on display.
Can I fix Blomberg Dishwasher E21 error myself?
Yes, you can reset the dishwasher by disconnecting power for 5-10 minutes and restarting a wash cycle.
How much does it cost to fix E21 error?
Estimated repair costs vary by model and region.
When should I call a technician for E21?
Call a technician if the error persists after a reset or if any components appear damaged.
Data last verified: 2026-07-31
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