Owning a Bosch appliance means the occasional repair, and knowing the common faults helps. Here is what we see across the line and how a proper diagnosis narrows it down.
From 300 Series to Benchmark
Bosch dishwashers, from the 300 Series up to Benchmark, are among the most common high-end machines in local kitchens, and they use a clear set of E-codes for water and drainage faults. The AquaStop system and the base-pan safety float are central to how these machines protect against leaks, which is why an E15 code shows up whenever water reaches the base. Understanding that safety logic is half the diagnosis.
The Codes That Matter
These four codes account for most Bosch dishwasher service. They point to the water circuit at different stages, so reading the exact code tells us whether to look at the supply side or the drain side first.
| Code | What It Means | What We Check |
|---|---|---|
E15 | Water in base pan, float tripped | Leak source and float switch |
E24 | Drain blocked or hose kinked | Filter, hose, and pump |
E22 | Filter restriction | Filter basket and sump |
E09 | Heating element fault | Element and wiring |
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