Bosch Washer Error Code E:21

E:21Bosch Washer

What this code means

Overflow level exceeded. Possible causes: Faulty/blocked pump, hose, inlet valve

Next steps: diagnose the root cause

1
Verify the error code is active

Power cycle the unit and see if the code returns. If it does, the fault is persistent and requires diagnosis.

2
Get the full diagnostic procedure

Get step-by-step guidance, test values, and wiring diagrams from the OEM service manual.

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Related Bosch washer error codes

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