Freezer shows E2 and may over-freeze or not defrost properly

Safety warning: Always unplug the freezer before removing the evaporator cover or working near wiring and sharp metal fins.

Steps to diagnose and fix:

• 1. Access the evaporator: Empty the drawers, remove the rear internal panel in the freezer compartment to expose the evaporator coil and defrost components.
• 2. Locate the defrost NTC: On AEG freezers, the evaporator sensor is usually clipped directly to the evaporator tubing or mounted in a small plastic clip on the coil.
• 3. Visual inspection: Check if the sensor has fallen off the coil or is encased in heavy ice. If it is not in firm contact with the tubing, re-clip it securely.
• 4. Defrost manually if iced: If the evaporator is a solid block of ice, allow it to defrost fully (doors open, towels in place) or use a hair dryer on low, keeping it away from plastic and wiring. Do not use sharp tools.
• 5. Electrical test: Disconnect the sensor and measure resistance with a multimeter. Compare to expected NTC values (typically several kΩ at 0–20°C). Replace if open, shorted, or far out of range.
• 6. Check harness and connectors: Trace the sensor wires back to the control board. Look for chafing where the harness passes through the cabinet. Repair any damaged sections and clean corroded connectors.
• 7. Replace sensor if needed: Fit a genuine AEG evaporator/defrost NTC, securing it in the original position on the coil.

Note: If E2 persists after sensor replacement and wiring checks, the main PCB may be misinterpreting the signal and should be evaluated by a technician.