Display shows E2 and freezer temperature is incorrect or not stable.

Safety first: Unplug the refrigerator before removing panels or touching wiring.

Steps to check:

• Locate the freezer sensor: Usually behind a small cover on the rear or side wall of the freezer. Remove shelves and drawers as needed to access.
• Visual inspection: Look for ice buildup around the sensor, broken insulation, or damaged wires. Defrost any heavy ice with the unit unplugged and doors open (do not use sharp tools).
• Test the sensor: Disconnect the sensor and measure resistance with a multimeter. Compare to expected NTC values (commonly 10 kΩ at 25°C; resistance will be higher at freezer temperatures). A reading of 0 Ω or infinite indicates failure.
• Replace the sensor: If readings are out of range, install a new freezer NTC sensor in the same location and route the cable as originally.
• Check wiring to PCB: Inspect the harness for pinched or cut wires, especially where it passes through cabinet walls. Reseat the connector at the main control board.

Important: If E2 remains after sensor and wiring checks, the main control board may need replacement. This should be done by a qualified technician.