Bosch dishwashers use clear E-codes that name the fault. E15 is the AquaStop leak trip, E22 and E24 point to drainage and filter clogs, E09 to the flow-through heater, and E18 to the drain pump not reaching flow. The code narrows it; the part is confirmed before replacement.
What the Codes Mean
Bosch E-codes name the fault: E15 leak, E22/E24 drainage, E09 heater, E18 drain pump. The code narrows it; a meter confirms the part.
| Code | Likely Cause | What the Fix Involves |
|---|---|---|
| E15 | AquaStop leak trip | Find the leak, dry the base pan, reset |
| E22 / E24 | Drainage or filter clog | Clean the filter, clear the drain hose |
| E09 | Flow-through heater fault | Test and replace the heater |
| E18 | Drain pump not reaching flow | Test the drain pump and check valve |
| E17 | Water inlet overfill | Check the inlet valve and float |
Before You Book
An E15 means water has reached the base pan and floated the safety switch, so the leak is found and the pan dried before the unit will run again. E22 and E24 are worked from the filter to the drain hose to the pump. E09 is a heater test.
Codes Point, They Do Not Fix
An error code narrows where to look, but the same code can have more than one cause. A technician confirms the fault with a meter before replacing a part, so you are not paying to swap good components.
Seeing a Bosch Code You Cannot Clear?
Book a visit and we will confirm the real cause before replacing anything. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Related
Bosch Repair Guide
Models and service notes.
Bosch Common Issues
The faults we see most.
Bosch Service
Full model coverage.