LG Refrigerator Error Code LS

The LS code on an LG refrigerator indicates that the lower compartment temperature sensor, identified as K3, is either disconnected or shorted. The control board cannot get a valid resistance reading from the sensor, so it triggers this fault. This can prevent the refrigerator from properly regulating the temperature in the lower compartment.

The LS fault means the refrigerator is not accurately monitoring the lower compartment temperature, so it may not be cooling that section reliably. Food safety could be at risk if the compartment is not maintaining proper temperatures. It is best to resolve the fault promptly and verify the compartment is holding the correct temperature before relying on it for perishables.

A power reset may temporarily clear the LS code from the display, but the fault will return if the underlying wiring or sensor problem has not been corrected. The control board will re-detect the open or short circuit in the K3 sensor circuit as soon as it resumes normal operation. A permanent fix requires inspecting and repairing the wiring or replacing the faulty sensor.

Start by checking the wiring harness and connector for the K3 lower compartment sensor. Look for loose connections, corroded pins, or damaged wires and repair or reseat them as needed. If the wiring is intact, test the sensor itself with a multimeter to determine whether it needs replacement. In many cases, the fix is as simple as reseating a loose connector.

If the fix is simply reseating a connector or cleaning corroded pins, there may be no parts cost involved, though a service call from a technician typically runs in the range of $75 to $150. If the K3 sensor itself needs replacement, parts generally cost in the range of $15 to $50, with total repair costs including labor potentially ranging from $100 to $250. Costs vary based on your location and the specific model.