The FS or F5 error code on your LG refrigerator indicates an issue with the freezer sensor. This sensor monitors the freezer’s temperature and sends that information to the main control board. When the control board doesn’t receive a valid signal, an error code appears.

Freezer Sensor FS or F5 Error Code on Your LG Refrigerator
Fixing the Freezer Sensor FS or F5 Error Code on Your LG Refrigerator

Causes of the FS or F5 Error Code On Your LG Refrigerator:

  • Moisture Buildup: Moisture around the sens or or its connector can disrupt the electrical connection, preventing accurate readings.
  • Loose or Damaged Wiring: The wiring harness that connects the sensor to the control board can become loose or damaged, interfering with signal transmission.
  • Faulty Freezer Sensor: A malfunctioning sensor may send inaccurate readings or fail to function entirely.
  • Main Control Board Issue: In rare cases, the main control board itself might be faulty, causing problems with receiving signals from the sensor.

Troubleshooting Steps:

  1. Check for Moisture: Inspect the sensor and connector for moisture or corrosion. If found, carefully dry the area with a soft, dry cloth and reconnect the sensor securely.
  2. Inspect the Wiring: Look for any visible damage to the wire harness, such as fraying or loose connections. If it is minor, you might be able to fix it with electrical tape. For severe damage, consider replacing the harness.
  3. Test the Freezer Sensor: Locate the sensor and use a multimeter to measure its resistance at room temperature (24.8 °C–77 °F). It should be around 9.6 kiloohms. A significantly different value or an open/shorted circuit indicates a faulty sensor needing replacement.
  4. Check the Main Control Board (for advanced users): With the sensor connected, use a multimeter to measure the voltage across the control board (around 1.86 Vdc). Then, disconnect the sensor and measure again (around 4.8 Vdc). Significant deviations or no change suggest a faulty control board that might require professional replacement.

Important Note: Steps involving the multimeter are for advanced users comfortable with electrical troubleshooting. If you are unsure, consult a qualified appliance repair technician.

By following these steps, you can identify the cause of the FS or F5 error code and potentially resolve the issue yourself.

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