Display shows E3 and the ice maker stops, often during the freezing stage.

Safety first: Unplug the ice maker before accessing internal components. Avoid using sharp tools on the evaporator.

• Allow defrost: Leave the lid open and unit unplugged for 30–60 minutes to melt any heavy ice buildup around the evaporator and sensor.
• Locate the thermistor: The thermistor is usually a small bead or bullet-shaped sensor clipped to or near the evaporator plate or ice tray, with two thin wires leading to the control board.
• Inspect the sensor and wires: Look for broken insulation, pinched wires, or a sensor that has come loose from its clip. Reseat the clip so the sensor contacts the metal surface properly.
• Check connection at the board: Remove the rear/bottom panel, find the thermistor connector on the main PCB, and ensure it is firmly plugged in.
• Test with a multimeter: At room temperature, the thermistor should show a stable resistance (often 5–50 kΩ depending on design). If it reads open (OL) or 0 Ω, replace the thermistor.
• If E3 persists with a new sensor: The control board’s sensor circuit may be defective and the main control board may need replacement.