Bosch AquaStop Alert: What the Leak Warning Means

Finding your washer or dishwasher halted with an alert can feel like a failure. In reality the machine just did its job. AquaStop is Bosch’s leak protection: when it senses water where none should be, it closes the supply so the leak cannot grow.

Which code you will see

On a washer the alert appears as E23. On a dishwasher it shows as E15. Different machines, same idea: a sensor or float found moisture and the inlet was shut.

What to do right away

1. Turn off the water valve that feeds the appliance.
2. Check the floor, the cabinet, and the wall behind for dampness.
3. Leave the cycle alone. Pressing Start to see if the message disappears only invites more water.

Why a false alarm is still worth checking

Condensation or a worn float switch can set off AquaStop with no puddle in sight. Even then, you cannot be sure from the outside. A real drip from a hose, seal, or pump looks the same on the display as a harmless trigger, so the inspection is what separates them.

The mindset to keep

Assume the leak is real until a technician shows otherwise. Mopping up a small puddle is a minor annoyance; repairing a soaked subfloor is not.

Mention which room the appliance is in and whether you saw water when you book, so the technician can plan for the right tools and floor protection before arriving at your door.

When you are ready, book a visit through our washer repair or dishwasher repair pages and mention the code on your display.