Vaillant Insufficient Rinse After Brine Draw

Softener produces salty-tasting water immediately after regeneration

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.

Possible Causes

Shortened rinse time in programming, Restricted drain flow reducing rinse effectiveness, Brine valve leaking during service, Incorrect valve sequencing

How to Fix / Troubleshooting

Safety: Do not drink water that tastes strongly of salt until the issue is resolved.

Steps:

Check drain flow: Ensure strong flow from the drain during rinse stages. Clear any restrictions in the drain hose or air gap.
Review settings: Verify that the rinse duration matches Vaillant specifications for your model.
Inspect brine valve: Confirm that the brine valve fully closes at the end of brine draw. Replace the valve cartridge if it leaks.
Flush system: After repairs, run several minutes of water at a tap to flush residual salt.

Repair Difficulty

Medium 3/5

Required Part

Drain Line and Brine Valve

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