Bosch Washing Machine Error E21
⚡ Quick Answer: The Bosch washing machine error E21 indicates a drainage issue, typically due to a blockage or malfunction in the drain system. This error occurs when... ✅ DIY Fixable
What Does Error E21 Mean?
The Bosch washing machine error E21 indicates a drainage issue, typically due to a blockage or malfunction in the drain system. This error occurs when the machine cannot properly drain water, resulting in the washing machine stopping mid-cycle and water remaining in the drum. Common causes include a clogged or faulty drain pump, a blocked filter, or a kinked drain hose. Regular maintenance and inspections can prevent this problem.
Common Symptoms:
- Washing machine stops mid‑cycle and displays E21
- Water remains in the drum and does not drain
- Pump/filter area may exhibit debris or blockage indications
Possible Causes
- Blocked or kinked drain hose or system (medium)
- Clogged or faulty drain pump or filter (medium)
How to Fix Error E21
DIY Fix Check and clear drain hose and filter
- Unplug the washing machine.
- Inspect and straighten the drain hose at the back; ensure it’s not kinked or obstructed.
- Access the drain pump filter (usually via lower front panel), remove debris and rinse the filter.
- Reconnect hose and filter, then run a short drain cycle to test.
Technician Only Inspect and service drain pump and related components
- Disconnect power and water.
- Remove access panels to reach the drain pump and check for foreign object blockage or impeller damage.
- Test the drain pump’s electrical function and replace if faulty.
- Verify correct installation and seating of drain hose and clamps.
Parts needed: drain pump, drain pump filter, drain hose
- If water continues to remain after clearing blockages and basic checks.
- If unusual noises occur during drainage indicating mechanical failure.
- If the error persists despite cleaning and pump inspection.
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 Washing Machine 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.
Washing Machine Cleaner Tablets
Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.
Braided Washer Inlet Hoses
A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.
Washer Drain Hose Holder
Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| wattage | 50W |
|---|---|
| component | Drain Pump |
| resistance | 10-20 ohms |
| part_number | Bosch 00619819 |
| voltage_rating | 120V AC |
Common Questions
What does E21 error mean on bosch washing machine?
E21 error indicates a drainage fault, causing the machine to stop mid-cycle with water remaining in the drum.
Can I fix bosch washing machine E21 error myself?
Yes, check and clear the drain hose and filter by unplugging the machine, inspecting the hose, and cleaning the filter.
How much does it cost to fix E21 error?
The estimated repair cost for fixing the E21 error ranges from ¥5,000 to ¥15,000, depending on the model and region.
When should I call a technician for E21?
Call a technician if water remains after clearing blockages, if you hear unusual noises during drainage, or if the error persists.
Sources & References
Data last verified: 2026-07-25
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