E11
Cillit
Regeneration Scheduling / Timer Fault
E11 displayed, unit does not start scheduled regeneration cycles
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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
Incorrect time or day settings, Disabled regeneration program, Faulty real‑time clock on Cillit PCB, Stuck keypad or damaged buttons
How to Fix / Troubleshooting
Safety: No internal water work is required for basic checks, but disconnect power if removing the control panel.
- Verify time and date: Check that the current time, day of week, and regeneration time are correctly set on the Cillit controller.
- Check program mode: Ensure the unit is not set to “OFF”, “VACATION”, or “MANUAL ONLY” mode. Switch to the appropriate metered or time‑clock mode as per the manual.
- Test keypad: Press each button and confirm that the display responds. If some keys do not work, the keypad membrane or PCB contacts may be faulty.
- Manual regeneration test: Start a manual regeneration. If this works but automatic cycles never start, the real‑time clock circuit on the Cillit main control PCB may be defective.
- Replace control board: Persistent E11 with correct programming usually requires replacement of the control board by a qualified technician.
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Repair Difficulty
Medium
3/5
Required Part
Cillit control panel keypad
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