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Bosch Washing Machine

Bosch Washing Machine E21 error

Motor / drum rotation fault

Needs a technicianCross-checked from 2+ sources

Try a reset once. If it comes back, a trained technician should repair it.

Also shown as: F21

What it means

The motor is not running at the right speed, is locked, or its speed signal is wrong.

Common causes

  • Overloaded drum or an object jamming it
  • Faulty motor, worn brushes or speed sensor
  • Loose motor wiring or faulty motor control board

Try this at home first

Tick each step as you go

When to call a technician

If the code repeats, the motor and its control need checking by a technician.

Safety first

Always switch off at the wall socket or MCB before touching any part. Do not open the outdoor unit, control boards or gas pipes yourself — they carry high voltage and pressure.

Frequently asked questions

What does E21 mean on a Bosch Washing Machine?

Motor / drum rotation fault. The motor is not running at the right speed, is locked, or its speed signal is wrong.

Can I fix Bosch Washing Machine error E21 myself?

You can try a reset first: Switch off and unplug for 5 minutes. If the code returns, call a technician.

Is it safe to keep using the Washing Machine with E21?

Avoid repeated restarts; running with this fault can cause more damage.

Other Bosch Washing Machine codes

E16 Door / lid not closed or not locking E17 Water not filling / water supply problem E18 Water not draining E19 Heating fault E23 Water leak detected E29 Water not filling / water supply problem

All Bosch Washing Machine error codes

Same code on other brands

E-21 Oven temperature sensor faultSamsung Microwave F21 Outdoor coil (condenser) temperature sensor faultHaier AC

Sources

We write every explanation in our own words from these references.

Last checked: 2026-10-20