LG Refrigerator Error Code Error3

Error3 indicates that the R2 temperature sensor, located in the lower part of the refrigerator compartment, has been detected as abnormal by the control board. The fault is caused by either a short circuit or an open circuit condition in the sensor or its wiring. The refrigerator uses this sensor to regulate cooling in the fresh food section, so the error should be addressed to maintain proper temperature control.

Error3 can compromise the refrigerator's ability to accurately maintain temperature in the lower compartment. Food safety may be at risk if the fridge is not cooling correctly as a result of the fault. It is advisable to monitor food temperatures and address the error as soon as possible rather than relying on the refrigerator to operate normally while the sensor fault is active.

A power reset may temporarily clear the error code from the display, but if the underlying sensor fault is still present, Error3 will return once the control board re-evaluates the sensor signal. Resetting the unit is not a fix for this error. The root cause, whether a failed sensor, damaged wiring, or a loose connector, must be identified and corrected for the code to stay cleared.

A knowledgeable DIYer can begin by entering the display check mode (press FREEZER and ICEPLUS simultaneously for over 1 second) to confirm the fault, then visually inspect the sensor wiring and connector for obvious damage or looseness. If the wiring looks intact, testing the thermistor resistance with a multimeter is the next step. Replacing the R2 sensor is a straightforward repair if the sensor is confirmed faulty, though tracing wiring faults deeper into the harness may require more experience.

If the repair only requires a new R2 thermistor sensor, parts typically range from roughly 15 to 50 dollars depending on the model. A service call with labor can add anywhere from 80 to 200 dollars or more. If the fault turns out to involve the main control board, total repair costs can rise significantly higher. Getting a diagnosis first will help clarify the actual scope of the repair.