FixApplianceCode

Bosch F21 error code

Washer

Bosch error code F21 on a washer means: Motor fault — drum not turning properly. This guide walks you through the most common causes, step-by-step troubleshooting, and replacement parts that typically resolve F21 on Bosch washers.

Safe to keep using?

Use caution

This issue may worsen during use — limit operation and address promptly.

  • • Turn off the water supply before disconnecting hoses.
DIY Difficulty
6 /10MODERATE

DIY difficulty: 6/10 — this repair usually requires appliance disassembly, electrical testing.

Time: 1–2 hours
Risk: Moderate
Skill: Intermediate
Tools: Screwdriver, Adjustable pliers, Multimeter, Flashlight, Work gloves, Socket set
Power disconnect requiredWater shutoff requiredDisassembly required

Likely causes

Most likelyUser-serviceable issue

Many codes resolve with cleaning, resetting, or reconnecting.

Check: Power-cycle the appliance and check for obvious blockages or loose connections.

Est. cost: $0–$0

PossibleFailed component

Wear or electrical failure of an internal part.

Check: If basic checks fail, the faulty component likely needs replacement.

Est. cost: $0–$75

Repair or Replace?

DIY repair

$26–$49

Professional repair

$191–$259

Comparable replacement

$659–$891

Our recommendation

REPAIR LIKELY MAKES SENSE

REPAIR LIKELY MAKES SENSE. Professional repair ($191–$259) is well below replacement cost.

Actual repair and replacement costs vary by model, location, labor rate, and condition.

What it means

Motor fault — drum not turning properly.

How to fix it

  1. Unplug the washer or turn off power at the breaker before inspecting any components.
  2. Confirm the error code F21 is still displayed after a power reset — hold power for 10 seconds, then restart.
  3. Check the most common cause for F21: Motor fault — drum not turning properly.
  4. Inspect hoses, connections, and visible wiring for damage, clogs, or loose fittings.
  5. If basic checks don't clear the code, use our lookup tool for AI-powered diagnosis or contact a qualified technician.
  6. Reassemble, restore power, and run a test cycle. If F21 returns, the faulty component likely needs replacement.

Call a pro when: Call a technician if you smell burning, see sparking, hear grinding from the motor, or the code returns after replacing the suspected part.

Repair videos

F.21 Error Code Cleared and Washer Repair

Washing Machine F 21 Code | Bosch | Neff | Whirlpool / EASY FIX!

Fix Bosch Washing Machine F21 Error Reset * Easy Fix*

User manuals
Start with the official support page, then use the search options if that link has moved. You’ll usually need your model number.
OfficialBosch manuals & downloads

Search Bosch Home support by model number.

Manual librarySearch Bosch Washer manuals on ManualsLib

Free scanned manuals — search results, not a guaranteed match.

Web searchSearch the web for Bosch Washer user manual

Useful when manufacturer pages move or don’t list older models.

FAQ

What does Bosch F21 mean?

Motor fault — drum not turning properly.

Can I fix Bosch error F21 myself?

Many F21 errors can be fixed DIY if you're comfortable with basic tools. Start with the steps above. If the issue involves electrical components or the code returns after replacing parts, call a professional.

Do I need a replacement part for F21?

Not always — some F21 errors are caused by user-fixable issues like clogs or unbalanced loads. Try the troubleshooting steps first.

Other Bosch Washer codes

Bosch E17Bosch E13Bosch E23Bosch E25Bosch F17

Prevent this problem next time

  • Follow manufacturer maintenance schedule
  • Address small issues before they worsen

Sources

Manufacturer meaning

Motor fault — drum not turning properly.

FixApplianceCode guidance

Start with basic checks for Bosch F21 before ordering parts.

Source type: Part database

Source: ModelPartFinder + FixApplianceCode editorial

Last reviewed: 2026-08-09

FixApplianceCode may earn a commission when you purchase through qualifying links, at no additional cost to you. Affiliate disclosure

Get AI-powered fix steps for Bosch F21 →