Ice maker stops and displays E1; unit powers on but does not start ice-making cycle

Safety First: Unplug the ice maker before opening any panels. Do not work on live electrical parts.

Step-by-step checks:

• Power cycle the unit: Unplug the Antarctic Star ice maker for 5 minutes, then plug it back in to see if E1 clears. If it returns, continue.
• Locate the ambient temperature sensor: On most Antarctic Star countertop ice makers, the ambient sensor is a small thermistor clipped to the inner side wall or near the air intake behind the side or rear panel.
• Inspect wiring: Remove the rear/side cover. Look for a small 2-wire harness from the sensor to the main control board. Check for pinched, cut, or disconnected wires and reseat the connector firmly.
• Check sensor resistance: With the unit unplugged, disconnect the sensor from the board and measure resistance with a multimeter. At room temperature (20–25°C / 68–77°F), most NTC sensors should read between 5–20 kΩ (exact value varies). If it reads open (OL) or 0 Ω, the sensor is bad.
• Clean corrosion: If the connector pins are oxidized, clean gently with contact cleaner and reconnect.
• Replace the sensor: If resistance is out of range or intermittent when you wiggle the wires, replace the ambient temperature sensor specific to your Antarctic Star model. Route the new sensor along the original path and secure it with clips or tape away from moving parts.
• Control board check: If a known-good sensor still triggers E1, the main control board’s sensor input may be defective. At this point, replacement of the control board is recommended and is best done by a qualified technician.