Bosch Washer Error Code E21: How to Fix It
Hard 2-4 hours High Severity
Verified June 2026
- Error Code
- E21
- Brand
- Bosch
- Product Type
- washer
- Severity
- High
- DIY Difficulty
- Hard
- Estimated Fix Time
- 2-4 hours
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Tools You'll Need
- Phillips screwdriver
- Flathead screwdriver
- Multimeter
- Flashlight
- Socket wrench set
How to Fix Error Code E21
-
Safely disconnect power and water
Always disconnect power before performing any maintenance to prevent electrical shock -
Check for overloading
-
Manually test drum rotation
Be gentle when rotating the drum manually to avoid damaging internal components -
Inspect for foreign objects
-
Check drive belt condition
Support the back panel carefully when removing it to prevent damage -
Test motor operation
Only attempt electrical testing if you're comfortable using a multimeter safely -
Inspect motor carbon brushes
Take photos before disconnecting motor wires to ensure proper reconnection -
Check drum bearings
-
Reset and test
Ensure all panels are properly secured before reconnecting power
Parts You May Need
Drive belt
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Motor carbon brushes
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Washing machine motor
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Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
Drive belt
Check Price on Amazon
Motor carbon brushes
Check Price on Amazon
Washing machine motor
Check Price on Amazon
Drum bearing kit
Check Price on Amazon
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When to Call a Professional
Contact a professional technician if you find worn drum bearings, a faulty motor that needs replacement, or if you're uncomfortable working with electrical components. Motor and bearing replacement requires specialized tools and expertise.Frequently Asked Questions
What causes Bosch washer error code E21?
E21 errors are caused by motor or drum blockages, including foreign objects, worn drive belts, faulty motors, worn carbon brushes, or damaged drum bearings preventing proper rotation.
Can I still use my Bosch washer with E21 error?
No, do not use the washer when E21 appears. This error indicates a serious mechanical or electrical problem that could damage the motor or other components if operation continues.
How much does it cost to fix E21 error on Bosch washer?
Repair costs vary: drive belt replacement ($30-60), motor carbon brushes ($40-80), motor replacement ($150-300), or drum bearing replacement ($200-400 including labor).
Is E21 the same as F21 on Bosch washers?
Yes, E21 and F21 refer to the same error code on Bosch washers. Different models may display the code with either an 'E' or 'F' prefix, but both indicate motor or drum blockage issues.
How do I prevent E21 errors in my Bosch washer?
Prevent E21 by checking pockets for small objects before washing, avoiding overloading, using appropriate detergent amounts, and having regular maintenance performed every 2-3 years.