Refrigerator shows E3 and may not defrost properly; frost accumulates on the rear wall of the refrigerator compartment.

Safety first: Disconnect mains power. Be cautious when working around sharp evaporator fins.

Procedure:

• 1. Empty the refrigerator section: Remove shelves and drawers to access the rear inner panel.
• 2. Remove the rear liner panel: Unscrew and gently pull off the panel. If it is frozen in place, defrost with warm air (hair dryer on low) and towels to catch water.
• 3. Locate the evaporator NTC: It is usually clipped to the evaporator tubing or embedded in a small plastic housing attached to the coil.
• 4. Check placement and condition: Ensure the sensor is firmly clipped to the coil and not hanging loose. Inspect the cable for cuts or crushed sections.
• 5. Test the sensor: Disconnect the NTC and measure resistance at the current temperature (likely around 0–5°C after defrost). Compare to expected NTC curve. Replace if open/shorted or clearly out of range.
• 6. Inspect wiring to PCB: Follow the harness to the cabinet pass-through and to the main PCB. Check for pinched or corroded connectors. Repair or replace as needed.
• 7. Replace the sensor: Clip the new NTC in the same position on the evaporator, ensuring good thermal contact. Avoid bending the aluminum fins excessively.
• 8. Reassemble and test: Refit the panel, restore power, and allow 24 hours to confirm proper defrosting and that E3 does not reappear.