Ice maker stops shortly after starting; display shows E1 and unit will not enter ice-making cycle.

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

Steps to check and address E1:

• 1. Power reset: Unplug the unit for 10 minutes, then plug it back in and try again. Sometimes E1 is triggered by a temporary reading error.
• 2. Verify room temperature: Ensure the ice maker is used in a room between about 10–32°C (50–90°F). Extreme cold or heat can cause the ambient sensor to read out of range and trigger E1.
• 3. Access the sensor: Remove the rear or side service panel (typically held by Phillips screws). Locate the small NTC sensor clipped near the air intake or condenser area, connected by two thin wires to the main PCB.
• 4. Inspect wiring and connector: Check for broken insulation, pinched wires, or a loose plug on the main control board. Reseat the connector firmly. If you see corrosion, gently clean the pins with electrical contact cleaner (with power disconnected).
• 5. Test the sensor (if you have a multimeter): Disconnect the sensor from the board and measure its resistance at room temperature. Compare to the typical NTC spec (often around 5–10 kΩ at 25°C; consult the HOMCOM manual if available). If it reads open (infinite) or short (near 0 Ω), the sensor is defective.
• 6. Replace the ambient NTC sensor: If faulty, order a compatible HOMCOM ambient temperature sensor for your model. Clip the new sensor in the same location, route the wires away from hot or moving parts, and plug it into the same PCB connector.
• 7. Reassemble and test: Refit the panel, plug the unit back in, and run a full ice-making cycle to confirm the E1 code is cleared.

When to call a technician: If the sensor tests good but E1 persists, the main control board’s sensor circuit may be defective and should be diagnosed or replaced by a professional.