Display shows E3 and the refrigerator may not defrost properly, leading to ice buildup on the evaporator.

Safety: Unplug the refrigerator. Be cautious of sharp evaporator fins and sheet metal.

• 1. Access the evaporator: Remove freezer drawers/shelves. Take off the rear interior panel of the freezer to expose the evaporator coil and wiring.
• 2. Inspect for heavy ice: If the evaporator is encased in ice, allow it to fully defrost (doors open, towels on floor, or use a hair dryer on low with care). Do not chip ice with sharp tools.
• 3. Locate the evaporator sensor: The thermistor is usually clipped to the evaporator tubing or mounted near the top of the coil with a plastic clip.
• 4. Check wiring and connections: Look for broken wires, loose connectors, or corrosion. Reseat the connector and ensure the sensor is firmly attached to the coil.
• 5. Test the sensor: Disconnect and measure resistance at a known temperature (e.g., after defrost at room temp). Compare to expected NTC values. Replace if open, shorted, or out of range.
• 6. Reassemble and test: After replacing the sensor, reassemble the panel, restore power, and monitor for reoccurrence of E3 and for proper defrosting over the next 24–48 hours.

Call a technician if the sensor and wiring are good but E3 persists, as the main PCB may be defective.