Refrigerator runs continuously or not at all, temperature readings on display are inaccurate or show dashes, E03 appears.

Safety: Disconnect power before removing interior panels or touching wiring. Evaporator fins are sharp; wear cut-resistant gloves.

How to proceed:

• 1. Confirm symptoms: Check if the unit is over-icing behind the rear panel, or if the compressor runs constantly. E03 usually indicates the control cannot read the evaporator temperature.
• 2. Access the evaporator area: Empty the affected compartment, remove shelves/drawers, then remove the rear interior panel to expose the evaporator coil and fan.
• 3. Locate the evaporator sensor: It is typically clipped to the evaporator tubing or mounted near the coil in a plastic housing. Note its exact position for reinstallation.
• 4. Inspect for ice and damage: Heavy ice buildup can pull the sensor out of place or damage wiring. Carefully melt ice with a hair dryer on low, keeping it moving to avoid warping plastic.
• 5. Check wiring and connector: Look for broken wires, loose connectors, or corrosion. Reseat the connector firmly.
• 6. Test the sensor: With the sensor unplugged and power off, measure resistance. Compare to the expected NTC curve for your model. An open or shorted sensor must be replaced.
• 7. Replace and reposition: Install a new evaporator NTC sensor if needed, clipping it securely to the same location on the coil or bracket so it senses correctly.
• 8. Reassemble and test: Refit the rear panel, restore power, and monitor operation. The E03 code should clear after a short period if the sensor is functioning.

Professional help: If the sensor and wiring are good but E03 remains, the main control module may be defective and should be replaced by a qualified technician.