E21 Serious Moderate DIY

Bosch Washer E21 — Motor Locked / Spin Fault

Bosch Washer · Error code E21

What E21 Means

The motor cannot rotate the drum, or the drum is jammed. The control halts the cycle to prevent damage.

Symptoms

  • Drum will not turn
  • Clicking sound from motor
  • Cycle stops at spin
  • Burning smell

Common Causes

1
Item jammed between tub and drum

Coin, underwire, or sock wedged in the gap.

2
Failed motor bearings

Drum bearings seized, drum won't rotate freely.

3
Broken drive belt

On belted models, belt has slipped off or snapped.

4
Motor control board fault

Inverter not delivering correct phase to motor.

5
Worn carbon brushes (on brushed motors)

Brushes too short to maintain contact.

How to Fix It

  1. Unplug the washer and rotate the drum by hand — note resistance or grinding.
  2. Remove the lower kickplate; check between tub and drum with a flashlight for foreign objects.
  3. Remove the rear panel and inspect the drive belt and pulley.
  4. If drum spins by hand, check motor brushes (replace if worn).
  5. Test motor windings and tachometer for continuity.
  6. Replace drive belt, motor, or control board as indicated.
  7. If drum bearings are gone, professional repair is usually recommended.

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Drive belt View on Amazon→ Common replacement Motor carbon brushes View on Amazon→

More Bosch Washer Codes

E01 E01 — Door Lock Fault E02 E02 — Motor Fault E03 E03 — Drain Pump Fault E04 E04 — Water Inlet Fault E05 E05 — Heating Element Fault E06 E06 — Door Lock Circuit Fault

All Bosch codes → All washer codes →

Verified against manufacturer documentation: bosch-home.com

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.