How Bosch E-Codes Work
A Bosch dishwasher monitors its draining, filtering, heating and water level, and when one falls outside the expected range it stops and shows an E-code. The code names the subsystem, which tells you where to start. Below are the ones we see most often after E15, which we cover separately. As always, cross-check the exact code against your model, but the families are consistent across recent Bosch dishwashers.
Common Bosch E-Codes
| Code | Meaning | First Checks |
|---|---|---|
| E15 | Water in base tray (AquaStop) | Dry the tray; find leak if it returns |
| E22 | Filter or drain blocked | Clean the base filter and sump |
| E24 | Drainage fault | Drain hose, pump, sink connection |
| E09 | Heating element fault | Element and control; needs service |
E22 and E24: the Drainage Family
E22 typically points to a blocked filter or sump, so the water cannot reach the pump. Cleaning the cylindrical base filter and clearing the sump resolves many E22 events. E24 points to drainage failing further along: a kinked or clogged drain hose, a blocked drain-pump impeller, or a clogged connection where the hose meets the sink drain or disposer. Clearing the hose and connection resolves a good share of E24 codes; if it persists, the drain pump needs testing.
E09: the Heating Fault
E09 relates to the flow-through heating element that Bosch uses to heat the wash water. When the element or its control fails, the machine cannot reach temperature, so it flags E09 and dishes may come out poorly cleaned or wet. This is an internal repair that needs a technician to test the element and control and replace the failed part with a model-specific component.
E24 or E09 That Will Not Clear?
If a drainage code persists after cleaning the filter and hose, or you see E09, book a repair. See our Bosch repair page.
The Bottom Line
Bosch E-codes map to subsystems: E15 to the leak tray, E22 to the filter, E24 to drainage, and E09 to heating. Start with the filter and drain path for the drainage codes, and treat E09 as an internal heating repair. Each is a standard OEM fix once identified.
Want It Fixed Right?
Book a repair and we will bring the a part selected for the approved scope your model needs. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.