Bosch Washing Machine Error E23: What It Means and How to Fix It
Short answer
E23 on a Bosch washing machine means: the AquaStop leak-protection hose has been triggered (also F23). This cannot be fixed by the user. First step: Close the water tap right away (possible leak).
AquaStop triggered
How to fix it
- 1Close the water tap right away (possible leak).
- 2Do not use the machine until repaired; book a service appointment.
When to call a professional: Always.
Applies to: Bosch washing machines
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Source
Based on Bosch's official error code information: Bosch CH (DE) – Fehler E23 oder F23 bei der Waschmaschine. Last checked 2026-10-28. Codes and their meaning can differ by model and region; check your appliance's manual.
Frequently asked questions
What does Bosch washing machine error code E23 mean?
The AquaStop leak-protection hose has been triggered (also F23). This cannot be fixed by the user.
How do I fix E23 on a Bosch washing machine?
Close the water tap right away (possible leak). Do not use the machine until repaired; book a service appointment.
When should I call a technician for E23?
Always.