Err11
North Star Salt Level Sensor / Brine Tank Sensor Fault

Err11 on display, salt level indicator not working or always shows empty

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Possible Causes

Defective salt level sensor, Disconnected sensor wiring, Sensor fouled with salt or sludge, Control board sensor input failure

How to Fix / Troubleshooting

Safety: Unplug the unit. Wear gloves when working inside the brine tank.

  • 1. Locate sensor: Identify the salt level or brine tank sensor (if equipped) mounted in or above the brine tank.
  • 2. Clean sensor: Remove the sensor and gently clean off salt bridges, sludge, or iron deposits with warm water. Do not use abrasive tools.
  • 3. Check wiring: Follow the sensor cable to the control board. Ensure the connector is fully seated and the cable is not damaged.
  • 4. Test function: Reinstall the sensor, restore power, and check if the salt level reading updates after a short delay.
  • 5. Replace sensor or board: If Err11 persists, replace the salt level sensor. If a new sensor does not resolve the issue, the electronic control board may be defective.
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Repair Difficulty

Easy 2/5

Required Part

Salt Level Sensor
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