Display shows E3 and the ice maker stops mid-cycle. Evaporator may be iced over or not cold enough.

Safety first: Unplug the ice maker before removing covers or touching internal parts.

Step-by-step:

• Allow defrosting: If the evaporator (the cold metal fingers) is heavily iced, leave the unit unplugged with the lid open for 30–60 minutes to melt excess ice. Do not use sharp tools to chip ice.
• Locate the thermistor: On G3 Ferrari ice makers, the evaporator thermistor is usually clipped or glued to the side of the evaporator plate or tubing with a small metal or plastic clip.
• Check attachment: Ensure the sensor bulb or bead is firmly in contact with the evaporator surface. Re-clip or reattach with thermal tape if it has come loose.
• Inspect wiring and connector: Follow the thermistor wires back to the control PCB. Check for cuts, pinches, or corrosion. Reseat the connector on the PCB.
• Basic resistance check (for advanced DIYers): With the unit unplugged, disconnect the thermistor and measure its resistance with a multimeter. At room temperature (around 25°C), most NTC thermistors used in these units read between 5–20 kΩ. A reading of open circuit or 0 Ω indicates a failed sensor.
• Reset and test: Reassemble, plug in, and start a new cycle to see if E3 clears.

When to call a technician: If the thermistor tests good but E3 persists, the control PCB may have a defective temperature input circuit and should be replaced by a professional.