E11
Hansgrohe
EEPROM / Configuration Data Error
E11 displayed and the softener indicates memory or configuration error, often after a power outage.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Corrupted non-volatile memory, Power surge during write operation, Failing control board memory chip, Incorrect parameter programming
How to Fix / Troubleshooting
Safety: Disconnect power before prolonged work on the control panel.
- Power cycle: Remove power for at least 10 minutes, then restore. Check if E11 clears.
- Factory reset: Enter the installer menu and perform a factory reset according to the Hansgrohe service manual. Reprogram hardness, time, regeneration capacity, and other parameters.
- Check supply quality: Ensure the softener is connected to a stable power source. Consider using a surge protector to prevent future memory corruption.
- Re-test: After reprogramming, run a manual regeneration. If E11 reappears, the control board's memory section is likely defective and the board should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Main Control Board (Memory Section)
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