Unit powers on but does not make ice; display shows E1 shortly after startup.

Safety first: Unplug the Igloo ice maker before opening any panels. Do not work on the unit while it is connected to power.

• Power reset: Unplug the ice maker for 10 minutes, then plug it back in and restart. Sometimes E1 is a temporary sensor reading error.
• Check installation location: Ensure the unit is not placed in direct sunlight, near a stove, or in a very hot or very cold environment (typically 50–100°F / 10–38°C). Extreme temperatures can trigger sensor errors.
• Inspect the ambient sensor: On most Igloo countertop ice makers, the ambient thermistor is clipped to the inner side wall or near the air intake behind a side or rear panel. Remove the outer cover (usually Phillips screws on the back and bottom) and locate the small bead-type sensor with two thin wires.
• Check wiring: Verify the thermistor plug is firmly seated on the control board and that the wires are not pinched, cut, or corroded. Reseat the connector.
• Test the thermistor (advanced): Using a multimeter set to resistance (ohms), measure across the thermistor leads. At room temperature (around 77°F / 25°C), most Igloo NTC thermistors will read between 5–20 kΩ. If it reads open (OL) or 0 Ω, it is defective and should be replaced.
• Replace the sensor if faulty: Order a compatible Igloo ambient temperature sensor/thermistor for your exact model. Disconnect the old sensor, clip or unclip it from the cabinet, install the new one in the same location, and reconnect to the control board.
• If E1 persists: If a known-good sensor is installed and wiring is intact, the control board’s sensor input may be defective and the main PCB may need replacement.