What Thermador E25 error means on your dishwasher
Thermador dishwasher error code E25 indicates: Drain pump impeller blocked. This is classified as a Medium-severity issue — the appliance may continue operating but should be serviced soon.
What E25 means
E25 indicates the drain pump impeller is physically blocked, preventing rotation. Unlike E24 (slow drain), E25 means the pump cannot spin at all.
Common causes
Glass fragments, food debris, or small utensil pieces lodged in the pump impeller. The pump cover seal may also be compromised.
Troubleshooting steps
1. Remove the drain filter and pump cover (twist counterclockwise). 2. Look for and remove any debris blocking the impeller. 3. Verify the impeller spins freely by hand. 4. Reassemble and test with a rinse cycle.
When to call a technician
If the impeller is cracked or the pump motor doesn’t run after clearing debris, the pump assembly needs replacement. Thermador uses a brushless DC drain pump that requires exact OEM parts.
Error E25 quick reference
- Error code: E25
- Appliance type: Thermador Dishwasher
- Severity: Medium
- Repair type: Needs technician
- Affected components: Drain pump, impeller, check valve
Troubleshooting Thermador E25 step by step
- Power reset: Turn off the appliance at the circuit breaker for 5 minutes, then restore power. If E25 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 (Drain pump, impeller, check valve).
- Document the error: Note when E25 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 E25 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 (Drain pump, impeller, check 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 Drain pump, impeller, check valve
- Replacing failed components with genuine Thermador OEM parts
- Verifying the repair by running a test cycle and confirming the error clears
Preventing Thermador E25 from recurring
While some component failures are age-related and unavoidable, regular maintenance reduces the likelihood of error E25 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.
