E17
Aquabion Calibration Failure (Flow/Hardness/Level)

Aquabion softener shows E17 and indicates a sensor calibration error after setup.

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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

Incorrect calibration procedure, Unstable water conditions during calibration, Defective sensor (flow, hardness, or level), Firmware bug

How to Fix / Troubleshooting

Safety first: Ensure power is stable and no other work is being done on the plumbing during calibration.

  • Repeat calibration: Follow the Aquabion manual exactly for the specific sensor calibration (flow, hardness, or salt level). Ensure there is no water use in the home during the process.
  • Check sensor cleanliness: Clean the relevant sensor (e.g., turbine flow sensor, hardness probe, or salt level sensor) before recalibrating.
  • Verify wiring: Confirm all sensor harnesses are properly connected and undamaged.
  • Replace faulty sensor: If calibration repeatedly fails for one sensor, replace that sensor assembly. Persistent failures may require a control board update or replacement.

Warning: Do not attempt to bypass calibration by entering arbitrary values; inaccurate readings can cause poor softening performance.

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Repair Difficulty

Medium 3/5

Required Part

Relevant Sensor (Flow/Hardness/Level)
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