What Thermador E15 error means on your dishwasher
Thermador dishwasher error code E15 indicates: Water in base pan — anti-flood sensor triggered. This is classified as a High-severity issue — schedule service promptly to prevent further damage.
What E15 means on a Thermador dishwasher
Error code E15 indicates water has been detected in the base pan beneath the wash tub, triggering the AquaStop anti-flood protection system. The dishwasher immediately stops operation and activates the drain pump to prevent water damage to your kitchen floor.
Common causes
Cracked sump housing, failed tub-to-pump seal, loose hose clamp, worn door gasket allowing water to drip into the base, or condensation from a blocked vent. In Star Sapphire models, the third rack spray connection can develop leaks at the junction fitting.
Troubleshooting steps
1. Turn off the dishwasher and disconnect power. 2. Pull the unit forward and tilt it back approximately 45 degrees to drain water from the base pan (have towels ready). 3. Restore power — if E15 clears, run a short cycle and watch for new leaks. 4. If E15 returns, the leak source must be identified and repaired by a technician.
When to call a technician
If E15 recurs after draining the base pan, a technician must access the interior to locate the leak source. Do not continue using the dishwasher with an active E15 — water in the base pan can damage the motor, control board, and flooring beneath the unit.
Error E15 quick reference
- Error code: E15
- Appliance type: Thermador Dishwasher
- Severity: High
- Repair type: Needs technician
- Affected components: Base pan sensor, sump, hoses, AquaStop valve
Troubleshooting Thermador E15 step by step
- Power reset: Turn off the appliance at the circuit breaker for 5 minutes, then restore power. If E15 clears and doesn’t return, a transient electrical issue caused it.
- Visual inspection: Check for obvious issues — loose connections, visible damage, water leaks, or unusual sounds from the affected components (Base pan sensor, sump, hoses, AquaStop valve).
- Document the error: Note when E15 first appeared, whether it’s constant or intermittent, and any other symptoms (sounds, smells, performance changes).
- Check related systems: Error codes can sometimes be triggered by adjacent systems — verify that water supply, electrical connections, and ventilation are functioning normally.
Professional diagnosis and repair
If E15 persists after a power reset, professional diagnosis is required. Our certified Thermador technicians use factory diagnostic tools to read stored error history, test individual components (Base pan sensor, sump, hoses, AquaStop valve), and identify the exact failure point.
Repair typically involves:
- Retrieving and analyzing stored fault codes from the control board
- Component-level testing of the Base pan sensor, sump, hoses, AquaStop valve
- Replacing failed components with genuine Thermador OEM parts
- Verifying the repair by running a test cycle and confirming the error clears
Preventing Thermador E15 from recurring
While some component failures are age-related and unavoidable, regular maintenance reduces the likelihood of error E15 recurring:
- Follow the maintenance schedule in your Thermador owner’s manual
- Keep the appliance clean — debris and buildup accelerate component wear
- Address minor issues early — small problems left unrepaired often trigger error codes
- Use a surge protector — power fluctuations can damage electronic control boards
For complete specifications and troubleshooting documentation, visit the Thermador official site. To schedule certified Thermador dishwasher repair, Schedule service online — we service all Thermador models in all 50 states with genuine OEM parts and a 30-day labor warranty.
