E19
AquaUnique Valve Position Sensor Fault

E19 error and unit cannot detect correct valve position after regeneration

Advertisements

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.

Advertisements

Possible Causes

Failed optical or magnetic position sensor, Misaligned cam or rotor disc, Broken position sensor wiring, Control board position logic failure

How to Fix / Troubleshooting

Safety first: Unplug the softener and close inlet/outlet valves before opening the control head. Some water may spill when covers are removed.

Step-by-step:

  • Inspect cam alignment: Remove the AquaUnique control cover and verify that the cam/rotor disc is properly aligned on the motor shaft and not loose.
  • Check sensor mounting: Locate the position sensor (optical or magnetic) and ensure it is firmly mounted and correctly oriented relative to the cam.
  • Examine wiring: Look for broken or pinched wires between the sensor and control board. Reseat connectors.
  • Manual regeneration test: After reassembly, run a manual regeneration and observe whether the valve moves smoothly through all positions without triggering E19.

When to call a technician: If the sensor or cam is damaged, or if E19 persists, professional replacement of the sensor or entire control valve may be required.

Advertisements

Repair Difficulty

Hard 4/5

Required Part

AquaUnique Valve Position Sensor
Check Price on Amazon

We may earn a commission from links on this page.

Advertisements