Hansgrohe Outlet Hardness Sensor Drift

Softener display shows incorrect or fluctuating hardness readings on outlet water (models with built-in sensor).

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

Sensor fouling, Temperature compensation error, Aging sensor element, Poor electrical grounding

Safety: Turn off power and close inlet valve before removing in-line sensors.

Clean sensor: Remove the outlet hardness or conductivity sensor and clean it with a mild descaling solution, then rinse thoroughly.
Check grounding: Ensure the softener and plumbing are properly grounded to reduce electrical noise.
Calibrate if possible: If the control allows, perform a sensor calibration using a known hardness sample.
Replace sensor: If readings remain unstable, replace the outlet hardness sensor with a Hansgrohe-approved part.

Medium 3/5

Outlet Hardness / Conductivity Sensor

Check Price on Amazon

We may earn a commission from links on this page.