Vaillant Incorrect Installation on Hot Supply

Softener installed on hot water line by mistake, causing deformation or leaks

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

Softener connected to hot instead of cold feed, Exceeded maximum temperature rating, Internal plastic components warped

Safety: Hot water under pressure is hazardous. Isolate and allow to cool before working on the system.

Steps:

Verify connection: Confirm that the Vaillant softener is installed on the cold mains feed only.
Repipe if necessary: If connected to hot, have the plumbing corrected immediately.
Inspect for damage: Check the control head and tank for warping or leaks. Components exposed to excessive temperature may need replacement.

Hard 4/5

Control Head and Resin Tank (if heat-damaged)

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