Bosch Dishwasher Error Code E15 — What It Means & How to Fix It

What Does This Error Mean?

The E15 error on your Bosch dishwasher means water has collected in the base pan underneath the machine. The AquaStop flood protection system detected the water and shut everything down. This is a safety feature to prevent water damage to your kitchen floor.

Affected Models

Bosch 300 Series
Bosch 500 Series
Bosch 800 Series
Most Bosch built-in dishwashers

Common Causes

A leaking door seal or gasket allowing water to drip into the base
A loose or cracked internal water hose inside the dishwasher
The spray arm or spray arm seal is damaged and spraying water where it should not
Overfilling caused by a stuck water inlet valve
A cracked sump or wash pump housing leaking from below

How to Fix It

Turn off the dishwasher and unplug it from the wall. Then shut off the water supply valve under the sink.

Always disconnect power and water before working on a leak-related error.
Carefully pull the dishwasher out from under the counter. Tilt it backward about 45 degrees to let the water in the base drain out the front.

Have towels ready on the floor. Tilt slowly — the water can rush out quickly.
Use towels or a sponge to soak up all remaining water in the base pan. Let it dry completely.

The float sensor needs to drop back down for the error to clear.
While the dishwasher is pulled out, inspect all visible hoses and connections for drips or moisture.

Pay special attention to where the drain hose connects and the door seal area.
Slide the dishwasher back in, reconnect power and water, and run a short cycle. Watch for any new leaks.

If E15 comes back quickly, there is an active leak that needs professional repair.

When to Call a Professional

If tilting and drying the base does not permanently fix E15, there is an active leak inside. A technician needs to find and fix the leak source. Do not keep resetting the error without fixing the root cause. Expect repair costs of $150–$400 depending on the leak location.

Frequently Asked Questions

Is E15 a serious error?

Yes — it means water is somewhere it should not be. The dishwasher is protecting your home from flooding. Do not ignore this error or keep resetting it. Find the leak source and fix it.

Why does E15 keep coming back after I dry the base?

That means there is an active leak somewhere inside. Drying the base only removes the symptom, not the cause. Each time you run a cycle, more water leaks into the base. You need a technician to find and fix the leak.

What is the AquaStop system on a Bosch dishwasher?

AquaStop is Bosch's built-in flood protection. It has a float sensor in the base pan under the machine. When water reaches the sensor, it shuts off the water inlet and stops the cycle. It is designed to prevent water damage in your home.