Unit powers on but quickly displays E3 and stops; ice making does not start or stops early.

Safety first: Unplug the ice maker before removing covers or handling wiring.

• Locate the thermistor: Remove the top or side cover to access the evaporator plate area. The thermistor is usually a small probe or bead sensor clipped to or near the evaporator surface with two wires leading back to the control board.
• Inspect the sensor and wiring: Check for broken insulation, pinched wires, or corrosion at the connector. Make sure the thermistor is firmly attached to the evaporator surface.
• Test resistance: Disconnect the thermistor from the board and measure its resistance with a multimeter at room temperature. Compare to Magic Chef specifications (commonly in the 5–50 kΩ range depending on model). A reading of 0 Ω (short) or OL (open) indicates a failed sensor.
• Check connector at PCB: Reseat the thermistor plug on the control board. Look for bent pins or oxidation.
• Replace if defective: If the thermistor is out of spec or physically damaged, replace it with the correct Magic Chef evaporator sensor. Route the new harness away from sharp edges and hot components.
• Reassemble and test: Reinstall covers, plug the unit in, and start a cycle. Confirm that E3 does not reappear and that the unit completes a full ice cycle.