As an expert technician, I have diagnosed the LG refrigerator with error code E AS Auto-door Switch Error. This error is specific to high-end LG models equipped with the “Auto Open Door” feature, which uses a floor sensor and a motorized actuator to push the door open automatically.
Error Explanation
The E AS error indicates a communication or mechanical failure within the Auto-Door Motor assembly or its associated Limit Switch. The Main PCB (Power Control Board) monitors the position of the door actuator. If the actuator fails to move, fails to return to the “home” position, or if the Auto-Door Switch fails to signal that the cycle is complete, the system triggers this code and disables the auto-open function to prevent motor burnout.
LG refrigerator with error code E AS: Troubleshooting Instructions
- Perform a Power Reset: Disconnect the refrigerator from the power outlet for at least 5 minutes. This allows the Main PCB capacitors to discharge and may reset the motor’s home position.
- Inspect for Obstructions: Check the area at the bottom of the refrigerator door where the Auto-Door Actuator (the mechanical arm) extends. Ensure there are no floor mats, debris, or sticky spills blocking the arm’s movement.
- Check the Wiring Harness: Locate the wiring connection at the bottom of the door and the top hinge cover. Ensure the Wiring Harness is securely plugged in and that no wires are pinched, frayed, or corroded.
- Test the Auto-Door Switch: Access the Auto-Door Motor assembly (usually located behind a kick plate or under the door). Use a multimeter to test the internal Limit Switch for continuity.
- Inspect the Motor Drive: Manually check if the gear assembly inside the Auto-Door Motor is stripped or if the arm is physically jammed.
Expected Ohmic/Resistance Values
When testing the components with a multimeter, look for the following values:
- Auto-Door Motor: 15-50 Ω (A reading of 0 Ω indicates a short; “OL” or infinite resistance indicates an open coil).
- Auto-Door Switch (Closed): Less than 1 Ω (indicates good continuity).
- Auto-Door Switch (Open): Infinite resistance (OL).
- Sensor/Main PCB Signal: 5V DC (measured at the harness during the activation cycle).
Estimated Repair Cost
- Replacement Auto-Door Motor/Actuator Assembly: $85 – $210 USD.
- Replacement Wiring Harness: $25 – $55 USD.
- Main PCB (if the driver circuit is blown): $150 – $300 USD.
Warning: Always disconnect the refrigerator from the power source before removing any panels or testing electrical components. Failure to do so can result in severe electric shock or damage to the Main PCB. Use caution when handling the Auto-Door Motor assembly, as it contains moving gears that can pinch fingers.
Repair Difficulty: Intermediate
This repair is considered Intermediate. While a DIY user can typically replace the Auto-Door Motor assembly using basic tools (screwdriver, pliers, and multimeter), it requires removing the base grille or kick plate and working with delicate plastic clips and wire connectors. If the issue persists after replacing the motor, a Professional may be needed to diagnose a potential failure in the Main PCB.
I am a master Appliance Repair technician with over 35 years of experience in the field. I am passionate about helping people troubleshoot their appliances and fix common problems. My website, appliancemode.com, provides a wealth of information on troubleshooting common appliance issues and deciphering error codes. This website aims to empower people to tackle appliance repairs themselves and save money on service calls.
