GE ice maker shows E1 and stops ice production; unit may power on but not run the compressor or water system.

Safety first: Disconnect power before accessing internal components. Sharp metal edges are common inside the cabinet.

• Access the evaporator area: Remove the ice bin and internal panels to expose the evaporator plate or grid (follow the service manual for your GE model).
• Locate the thermistor: The evaporator thermistor is usually clipped or taped to the evaporator plate or tubing with two small wires leading back to the control board.
• Inspect wiring: Check for broken, pinched, or corroded wires. Ensure the thermistor is firmly attached to the evaporator surface.
• Check connector: At the control board, unplug and replug the thermistor connector. Look for corrosion or loose pins.
• Replace thermistor if damaged: If the sensor is cracked, swollen, or the wiring is frayed, replace it with a GE-compatible evaporator thermistor. Route the new harness along the original path and secure it away from moving parts.
• Test: Restore power and clear the code (if your model supports a reset). Run a full cycle to confirm normal operation.