Display shows E3 and the unit stops making ice; compressor may not start or may shut off quickly.

Safety first: Unplug the ice maker before accessing internal components. Avoid touching sharp metal edges around the evaporator.

Steps to address E3:

• Access the evaporator area: Remove the top or side cover to expose the ice-making chamber and evaporator plate.
• Locate the sensor: The evaporator sensor is usually clipped or glued to the evaporator plate or tubing with two small wires leading to the control board.
• Check mounting: Ensure the sensor is firmly attached to the evaporator surface. If it has fallen off, reattach using thermal tape or a clip designed for the Tristar evaporator NTC sensor.
• Inspect wiring: Look for cuts, abrasions, or pinched wires. Verify the connector at the control board is secure.
• Test the sensor: Disconnect the sensor and measure resistance at room temperature. Compare to the specification in the service manual (typically 5–20 kΩ). If reading is open, shorted, or far out of range, replace the sensor.
• Replace if faulty: Install a new Tristar evaporator temperature sensor, route the wiring properly, and secure it to the evaporator.
• Reassemble and test: Refit covers, restore power, and run a full cycle to confirm E3 is cleared.