Ice maker powers on but stops shortly after start; display shows E1 and no ice is produced.

Safety first: Unplug the Princess ice maker from the mains before opening any panels. Never work on the unit while it is connected to power.

Steps to check and fix:

• 1. Power reset: Unplug the unit for 10 minutes, then plug back in and try a new cycle. Sometimes E1 is triggered by a temporary reading error.
• 2. Check installation environment: Ensure the ice maker is used indoors, away from direct sunlight or heat sources. Extremely high or low room temperature can cause sensor out-of-range readings.
• 3. Inspect sensor wiring: Remove the rear or side service panel (depending on model). Locate the small NTC sensor harness that runs from the cabinet area to the main control PCB. Check for pinched, cut, or melted wires and reseat the connector firmly.
• 4. Test the sensor: With the unit unplugged, disconnect the sensor from the PCB and measure its resistance with a multimeter. Compare to the Princess service chart (typically 5–20 kΩ at room temperature). If it reads open, shorted, or far out of range, replace the sensor.
• 5. Inspect the PCB: Look for burnt spots, corrosion, or loose solder joints at the sensor input on the main board. If the sensor tests good but E1 persists, the control PCB may be defective and require replacement.

When to call a technician: If you are not comfortable using a multimeter or removing panels, or if the control board appears damaged, contact a qualified appliance technician.