What to check, in order
- Turn the tap off
Straight away.
- Don't run it again
Not until the leak has been found and fixed.
When to call an engineer
Now. Bosch's advice is to turn off the supply tap immediately and contact customer service.
A repair visit will usually check the hoses, seals and pump housing to find where the water is coming from.
- Note the model and serial number. They're on a label inside the door, around the door frame or on the back.
- Write down the exact code, and what the appliance was doing when it appeared.
- Check whether it's still under warranty. If it is, the repair may cost you nothing.
Quick answers
What does the Bosch E23 error code mean?
Water has leaked into the base of the washer, and the anti-flood system (AquaStop) has cut in.
Can I fix Bosch E23 myself?
Engineer only (tap off, then call). Start with: turn the tap off; don't run it again. Now. Bosch's advice is to turn off the supply tap immediately and contact customer service.
Is Bosch E23 worth repairing?
Deal with it now. Stop using it. The leak is often a small repair, but running the machine risks water damage that costs far more.
Checked against
Last reviewed October 2026. Manufacturers update their pages, and your manual is the final word. Spotted a mistake? Email contact@appliance-error-codes.com.