e21
Moderate
Bosch · Washing Machines
Motor fault / drive malfunction
Quick Answer
Error code E21 on your Bosch Washing Machines means: Motor fault / drive malfunction. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Check if the drum turns freely by hand; remove any obstructions.
2
Inspect motor carbon brushes for wear and replace if they are shorter than 15mm.
3
Test the tachogenerator with a multimeter.
4
If brushes and tachogenerator are fine, the motor or motor control module may need replacement.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Motor carbon brushes
Tachogenerator
Motor
Motor control module
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