Simple Fixes for the LG Refrigerator E SS Error Code

Understanding the LG Refrigerator E SS Error Code

As an expert technician, I have diagnosed the LG refrigerator with error code E SS (often misread as E 55), which indicates a pantry sensor error. This error signifies a communication failure or a resistance malfunction within the thermistor (temperature sensor) located inside the Glide ‘N’ Serve or Deli pantry drawer area.

LG Refrigerator E SS Error Code Explanation

The E SS error occurs when the main PCB (Power Control Board) detects a short circuit or an open circuit in the pantry room sensor. This sensor is responsible for monitoring the temperature of the specialized pantry drawer to ensure it stays at the selected setting (e.g., meat, deli, or produce). When the sensor fails, the refrigerator disables the pantry cooling function to prevent freezing.

Step-by-Step Troubleshooting

1. Hard Reset: Disconnect the refrigerator from the power outlet for 5 minutes. Plug it back in to see if the code clears. If the code returns immediately, proceed to hardware testing.
2. Inspect the Pantry Drawer: Open the refrigerator and remove the pantry drawer. Locate the pantry sensor cover (usually a small plastic grille on the side or back wall of the pantry section).
3. Check Connections: Ensure the wire harness connecting the pantry drawer assembly to the refrigerator wall is securely plugged in and that no wires are pinched, frayed, or corroded.
4. Test the Thermistor (Sensor): Use a multimeter set to the ohms (Ω) setting. Disconnect the sensor and measure the resistance across its terminals.

Expected Ohmic/Resistance Values

The pantry sensor is an NTC (negative temperature coefficient) thermistor. Its resistance changes based on the temperature:

• At 32°F (0°C): Approximately 30,000 Ω to 32,000 Ω (30k-32k Ω).
• At 77°F (25°C): Approximately 10,000 Ω (10k Ω).
• Failure State: If the multimeter reads 0 Ω (short) or “OL” (open circuit), the pantry sensor is defective and must be replaced.

Estimated Repair Cost

• Pantry Sensor/Thermistor Part: $25 – $60 USD.
• Pantry Wire Harness (if damaged): $40 – $85 USD.
• Professional Labor (if hired): $150 – $300 USD (including diagnostic fees).

Repair Difficulty: DIY

Difficulty Level: 2/5 (Easy/Moderate)
This repair is generally considered a DIY-friendly task. It requires basic tools (a screwdriver and a multimeter) and does not involve opening the sealed refrigerant system. Most users can complete the sensor replacement in 30 to 45 minutes. If testing the Main Control Board is required, a higher level of electrical knowledge is recommended.