Bosch · Washing Machine · Motor Fault

Bosch Washing Machine Error E21

Bosch washing machine error E21 usually indicates a motor or drive-system fault. ECL records this code as “Motor Drive Error”. Common causes on this page include Worn carbon brushes and Motor tacho fault, but the exact cause can vary by model and appliance generation. Keep to the external checks and safety guidance below; do not remove covers or test internal or live components, and arrange professional diagnosis if the code persists.

Quick answer: Motor Drive Error

In simple terms

Bosch washing machine code E21 usually means Motor Drive Error. Follow these four steps.

1Understand the code

See what the code usually means and why it may have appeared.

2Try safe checks

Try only the simple checks listed on this page. Do not take the appliance apart.

3Check if it is safe to use

Check the safety section before you keep using the appliance.

4Choose the next step

Use the next-step box to see whether to keep checking, find a part by model or get repair help.

What Bosch E21 means

The washer has detected a drive motor or motor control issue.

Repair help

Repair or replace?

Start with a repair option. If the appliance is older or the repair is expensive, you can then compare the cost of replacing it.

Get a repair option Compare replacement options

No obligation. Your contact details are only shared after you submit the repair request, and only with a suitable ECL Verified repairer where coverage is available.

Common causes

  • Worn carbon brushes
  • Motor tacho fault
  • Main PCB issue

Safe checks you can make

  1. Reduce the load
  2. Reset the appliance

When to stop and call an engineer

If standard user maintenance does not clear the error, or if you suspect an electrical component failure.

Your model may be different

Error-code meanings can vary by model, market and appliance generation. Confirm Bosch E21 against the instruction manual or support information for the exact model number before replacing parts or treating this page as a model-specific diagnosis.

Where this information comes from

Publisher: Error Code Lookup Editorial Team. This page is independent information written in our own words and reviewed with safety boundaries in mind.

Manufacturer information: Bosch UK User Manuals. Use the exact model number to verify model-specific wording and instructions.

Last reviewed: 2026-05-18

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Frequently asked questions

What does E21 mean on a Bosch washing machine?

The washer has detected a drive motor or motor control issue.

What usually causes Bosch error E21?

Common causes include Worn carbon brushes; Motor tacho fault; Main PCB issue.

Can I safely fix E21 myself?

This fault may require professional diagnosis or repair. Only basic external safety checks should be attempted.

When should I call a professional for E21?

If standard user maintenance does not clear the error, or if you suspect an electrical component failure.

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