Short answer: E15 means water has collected in the base tray and tripped the anti-flood float, so the dishwasher shuts off and drains. The fix is to find and stop the small leak, dry the tray to reset the float, then confirm a full cycle.
What E15 Is Telling You
Bosch dishwashers have a base tray with a float switch. If water leaks into the tray, the float rises, trips the switch, and the dishwasher shows E15, stops, and often drains continuously. The code is not the fault; it is the anti-flood system reacting to a leak somewhere above.
Finding the Leak
The leak can come from a worn door gasket, a loose or split hose, a spray-arm seal, a leaking pump, or a cracked salt or detergent reservoir. We trace the source, because simply drying the tray without fixing the leak brings E15 straight back on the next cycle.
Clearing It Properly
Once the leak is fixed, the base tray is dried so the float drops and resets, and we run a full cycle to confirm the tray stays dry and the code does not return. That verification is the difference between a real fix and a temporary reset.
Error & Symptom Reference
| Cause of Tray Water | How It Presents | Fix |
|---|---|---|
| Worn door gasket | Water down the front | Replace gasket |
| Loose/split hose | Water under the base | Secure/replace hose |
| Pump seal leak | Slow tray fill | Replace pump seal/pump |
| Cracked reservoir | Detergent/salt leak | Replace reservoir |
When to Call a Technician
A one-time hiccup can follow a power blip, but when the problem keeps returning on a Bosch unit it is worth a real diagnosis. The diagnosis narrows a Bosch fault to one part, we quote the repair in writing, and we complete it with genuine OEM parts. It helps to record whether the problem happens cold, mid-cycle, or under load, since the timing points to different parts. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.
Want This Handled for You?
Book a diagnosis. Diagnostic and travel fees, if applicable, are confirmed before the appointment and before repair approval.