Bosch is best known for dishwashers, where faults show as E codes (sometimes written E:15 or with a blinking tap/water symbol on older models). The same code numbers carry across the Bosch, Siemens, Neff, and Gaggenau family. The most common by far is E15. Find your code below.
⚠ Safety first. Unplug the appliance (or switch off its breaker) before touching internal parts. Gas, high-voltage, and sealed refrigerant-system repairs must be done by a licensed professional. If you smell gas or see scorching, stop and call a technician.
Bosch dishwasher codes
| Code | Meaning | Most likely cause |
|---|---|---|
| E15 | Water in the base tray — anti-flood (AquaStop) float tripped | A slow leak has pooled water under the machine; often clears after drying the base |
| E24 | Drainage fault — water not leaving | Clogged filter, blocked drain hose, or debris in the pump |
| E22 | Filter / drain blockage | Dirty filter or blocked sump |
| E09 | Heating element / flow-through heater fault | Failed heating element or its control |
| E16 / E17 | Water inlet fault — unwanted or excess fill | Inlet valve stuck open (E16) or supply pressure too high (E17) |
Why E15 is so common
Bosch dishwashers have a polystyrene float in the base. Any small leak collects there and lifts the float, which triggers E15 and runs the drain pump continuously to protect your floor. It is usually a genuine minor leak rather than a failed part — the fix starts with finding and drying the source. See the dedicated Bosch E15 page for the full step-by-step (published as part of the code database).
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