Ice maker runs continuously and does not stop even when the bin is full of ice.

Safety first: Unplug the unit before inspecting sensors.

• Verify full condition: Remove some ice and see if the unit ever stops on its own. If it never stops, the full detection is not working.
• Clean sensors: For IR sensors, clean the lenses. For mechanical levers, ensure they move freely and are not broken.
• Check wiring: Access the sensor harness and confirm it is connected securely to the control board.
• Test sensor: With the unit running, manually block the IR beam or lift the lever to simulate a full bin and see if the unit responds (may require brief power-on testing; use caution).
• Replace faulty parts: If the unit does not respond to a simulated full condition, replace the ice level sensor assembly. If a new sensor does not fix it, the control board may be defective.