LG Freezer Error Code E1

E1 on an LG freezer indicates a failure in the left compartment temperature sensor circuit. The sensor wire may be cut, the connector may be damaged, or the thermistor itself may have failed. The PCB monitors the sensor signal at CON2 pins 1 and 2 and triggers E1 when the voltage falls outside the normal 0.5 Vdc to 4.5 Vdc range.

Yes, the E1 fault should be addressed promptly. Without a functioning left compartment sensor, the PCB cannot accurately monitor or regulate temperatures in that zone, which can allow food to thaw or temperature swings to go undetected. Do not rely on the freezer for long-term food storage until the sensor circuit is repaired.

Repair cost depends on what has failed. A replacement left compartment thermistor typically costs between $15 and $50 for the part alone. If the wiring harness needs replacement, parts can range from $30 to $80 or more depending on the specific model. Adding professional labor, total repair costs generally fall between $100 and $250, though a corroded connector that only requires cleaning and reseating may cost nothing beyond diagnostic time.

A knowledgeable DIYer can diagnose this fault by disconnecting CON2 from the PCB and measuring the voltage at pins 1 and 2. A reading near 5 Vdc points to an open circuit, while a reading near 0 Vdc points to a short. If the issue is a loose or corroded connector, cleaning and reseating it may resolve the fault. Replacing the sensor wire or thermistor requires basic electrical repair skills and the correct replacement part.

Resetting the unit may temporarily clear the E1 code from the display, but the error will return if the underlying sensor or wiring fault is still present. A reset does not repair a broken wire, failed thermistor, or corroded connector. The root cause must be diagnosed and corrected to permanently clear the fault.