Kenmore ice maker runs continuously and never shuts off even when the ice bin is full.

Safety First: Unplug the ice maker before accessing the bin sensor or control board.

• Check for obstruction: Make sure ice is not piled up against the sensor window or physically blocking a mechanical bin arm.
• Clean sensor lenses: For IR-style sensors, gently clean the emitter and receiver lenses with a soft, dry cloth.
• Test sensor function: Many Kenmore models allow entering diagnostic mode to test bin sensor status. Follow the tech sheet to verify that the control sees bin FULL when you block the sensor.
• Replace defective sensor: If the sensor never changes state, replace the bin level sensor or thermistor with the correct OEM part.
• Control board check: If a known-good sensor does not stop production, the main control board may be faulty and require replacement.