LG Refrigerator Error Code 1

Error code 1 on an LG refrigerator indicates an ice maker sensor system abnormality. The control board has detected that the ice maker thermistor is reporting a temperature outside the valid range of -58°F to 122°F, or is not communicating at all. Possible causes include a cut wire, short-circuit, contact failure at a connector, a missing sensor housing, or a defective thermistor.

Error code 1 is not a safety hazard in terms of fire or shock risk under normal circumstances. However, if the ice maker sensor is not functioning correctly, the ice maker may not operate properly or may run outside of its intended parameters. It is best to address the fault promptly to avoid secondary issues with ice production or potential overcooling in the ice maker compartment.

Repair costs vary depending on what is found during diagnosis. If only a connector needs reseating or a wire needs to be repaired, costs may be minimal, primarily covering a service call in the range of $75 to $150. If the ice maker thermistor needs replacement, parts typically range from $15 to $50, and total repair costs including labor generally fall between $100 and $250.

Start by unplugging the refrigerator and inspecting the ice maker sensor wiring harness for any cuts, pinched wires, or loose connectors. Reseat the connector firmly and check for corrosion on the terminals. If the wiring looks intact, use a multimeter to test the thermistor resistance and compare it against the expected value for the current temperature. If the sensor reads out of range, replacing the thermistor is the typical repair.

A reset may temporarily clear the display, but error code 1 will return if the underlying wiring or sensor fault has not been corrected. Unplugging the unit for a few minutes resets the control board, but the code will reappear once the board re-reads the faulty thermistor signal. A permanent fix requires diagnosing and repairing the sensor circuit.