E12
Winterhalter
Water Softener / Regeneration Fault
E12 displayed; machine may not regenerate softener or shows issues with water softening.
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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
Empty salt reservoir, Blocked brine injector or softener valve, Faulty softener regeneration valve, Incorrect hardness setting
How to Fix / Troubleshooting
Safety first: Switch off the machine before removing covers.
- Check salt level: Open the salt compartment and ensure it is filled with dishwasher-grade regeneration salt. Top up if low and run a few cycles.
- Verify hardness setting: Using the user menu, confirm that the water hardness is set according to local supply. Adjust if necessary.
- Inspect for salt bridges: Break up any hardened salt bridges in the reservoir with a non-metallic tool.
- Service check: If E12 continues, the softener valve or brine system may be blocked or defective and should be checked by a technician.
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Repair Difficulty
Medium
3/5
Required Part
Softener Regeneration Valve
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