The E23 error on your Siemens Dishwasher means there is a drainage problem, specifically that water has leaked into the base pan and activated the safety flood protection system. Check the base pan and drainage components immediately to prevent further damage.
| Error code | E23 |
|---|---|
| Meaning | Water leak detected in base pan (flood protection activated) |
| Severity | High — May cause water damage if not addressed promptly |
| Time to fix | 30–90 minutes |
| Tools needed | Towels, screwdriver, pliers, multimeter (optional), shallow container |
What the E23 error means
The E23 error indicates that water has leaked into the base pan of your Siemens dishwasher and triggered the flood protection system. This safety feature uses a float switch or sensor in the base to detect water accumulation. When activated, the dishwasher stops normal operation to prevent flooding your kitchen. The water may have come from a faulty hose, damaged door seal, or internal component leak.
Common causes
- Blocked or kinked drain hose preventing proper water drainage
- Damaged or worn door seal allowing water to leak during the wash cycle
- Faulty inlet valve leaking water into the base pan
- Cracked or loose hose connections inside the dishwasher
- Overfilling due to a malfunctioning water level sensor or pressure switch
- Damaged sump or circulation pump housing allowing water to escape
How to fix the E23 error
- Disconnect power and water supply: Turn off the dishwasher at the wall socket or circuit breaker and shut off the water supply valve under your sink to ensure safety before inspection.
- Remove water from the base pan: Pull the dishwasher out from its cabinet space and carefully tilt it back approximately 45 degrees to drain water from the base pan into towels or a shallow container. You may need to remove the lower front panel to access the base area directly.
- Inspect and dry the base pan: Once tilted, check the base pan thoroughly for standing water. Use towels to dry it completely. Locate the float switch in the base pan and ensure it moves freely without obstruction.
- Check all hoses and connections: Examine the drain hose, inlet hose, and internal hoses for cracks, kinks, or loose connections. Tighten any loose clamps and replace damaged hoses. Pay special attention to where hoses connect to the pump and valve assemblies.
- Inspect the door seal: Open the dishwasher door and carefully examine the rubber door gasket around the entire perimeter for tears, wear, or debris buildup. Clean the seal with warm soapy water and replace it if damaged.
- Test the dishwasher: After addressing the leak source and ensuring the base pan is completely dry, reconnect power and water. Run a short cycle while monitoring for leaks. The E23 error should clear if the issue is resolved.
FAQ
Can I reset the E23 error without fixing the leak?
No, simply resetting the dishwasher will not resolve the E23 error if water remains in the base pan or the leak source is not fixed. The flood protection system will immediately trigger again. You must remove the water from the base pan and repair the leak source before the error will clear.
How much does it cost to fix a Siemens dishwasher E23 error?
If you can identify and fix the issue yourself, costs range from £10 to £60 for replacement parts like hoses or door seals. Professional repair typically costs between £120 and £250 including labour and parts, depending on the specific component that needs replacement and your location.
Is it safe to use my dishwasher with the E23 error showing?
No, you should not use your dishwasher when the E23 error is displayed. This error indicates active water leakage that could damage your kitchen floor, cabinets, or the dishwasher itself. Continuing to use it risks electrical hazards and more extensive water damage to your home.
