BWT
Loss of Softening Capacity
Water remains hard at taps despite the BWT softener appearing to run normally
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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
Exhausted or fouled BWT ion-exchange resin, Incorrect hardness setting in controller, Bypass valve left partially open, Insufficient brine concentration due to low salt
How to Fix / Troubleshooting
Safety first: Use caution when opening the brine tank and valve head. Wear gloves when handling resin or brine.
- Check bypass: Confirm the BWT bypass lever is in Service position. A partially open bypass will mix hard and soft water.
- Verify salt level: Ensure the brine tank has adequate BWT-approved salt and that there is water visible above the bottom grid.
- Reprogram hardness: Enter the controller menu and verify that the raw water hardness is set correctly according to your water test. Adjust if necessary.
- Manual regeneration: Initiate a full manual regeneration and test water hardness at the outlet after completion.
- Resin condition: If water remains hard, the resin may be exhausted or iron-fouled. Consider a professional resin cleaning or replacement with genuine BWT resin.
Persistent hardness issues after these steps warrant a full system check by a technician.
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Repair Difficulty
Medium
3/5
Required Part
BWT ion-exchange resin
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