Bosch Washing Machine Error Code E23
The machine has detected water in its base tray and the AquaStop system has shut off the water supply to prevent damage. This is a protective stop, and Bosch directs users to close the tap, disconnect power, and arrange service.
Also shown as: F23, E35, F35
Common causes
- Internal hose or pump leaking
- Door seal leaking
- Cracked tub or sump
- Previous leak still sitting in the base tray
What to check, in order
- Close the water tap and unplug the machine immediately.
- Do not keep restarting it to clear the code; the water in the base has to be found and removed.
- Book a technician: locating an internal leak means opening the machine.
Clear the code and test
- Fix what the checks above found first — a filter cleaned, a hose straightened, taps opened. Clearing the code without fixing the cause only brings it back.
- Close the door, plug the machine back in and restore the water supply.
- Run a short rinse and spin, or the shortest wash programme, and watch the stage where the code appeared before (filling, washing, draining or spinning).
- If the cycle finishes with no code, the fault is cleared. If the code returns at the same stage, write down the code and that stage before calling a technician — it speeds up the diagnosis.
When to call a professional
This code usually points to a faulty part, wiring or the control board on a Bosch washing machine. Run the checks above to rule out the simple causes, then book a technician — and book one straight away if any of these apply:
- The code comes back after you have run the checks and a test cycle.
- You smell burning, see sparks or scorch marks, or the breaker trips.
- Water is leaking and you cannot stop it at the tap.
- The fix needs panels opened beyond what your manual describes, or a part tested with a meter, and you are not set up for that.
When you call, give the brand, the code E23, your model number (on a label inside the door or on the back) and the checks you already ran. It shortens the visit.
Repair or replace?
This fault is in professional territory: the fix usually means a major part or board-level work, and the labour adds up. If your machine is already well into its service life, get the repair quote first, then compare it with the price of a current equivalent model before you decide. Paying a large share of a new machine's price to repair an old one is rarely the better deal; replacing a machine over one cheap fault is wasteful too.
Parts that may be involved
AquaStop hoseDrain pumpDoor seal
Parts are model-specific. Find your model number first — usually on a label inside the door, on the door frame or on the back — and match the part to that number before ordering.
Questions people ask about E23
What does E23 mean on a Bosch washing machine?
E23 means: Leak detected: AquaStop activated. The machine has detected water in its base tray and the AquaStop system has shut off the water supply to prevent damage. This is a protective stop, and Bosch directs users to close the tap, disconnect power, and arrange service.
Can I fix Bosch E23 myself?
Only the preliminary checks. Code E23 usually means a part, wiring or the control board has failed, which is a technician job. Run the checks to rule out simple causes before you book.
How do I clear Bosch E23?
Fix the cause first — clearing the code on its own brings it straight back. Then restore power and water, run the shortest programme, and watch the stage where the code appeared. If the programme finishes with no code, it is cleared.
Sources checked
- Bosch Home (US) owner support: dishwasher error codes
- Coolblue advice: Bosch and Siemens washing machine errors
The meaning and checks for this code were checked against the sources above in November 2026. Codes vary by model and region; if your manual lists a different meaning for your exact model, follow the manual.