LG Refrigerator Error Code E3

E3 indicates an outside temperature sensor error on an LG refrigerator. The sensor is located on the display panel and the error appears when the control board detects the sensor signal is out of range. You can confirm the error by pressing the Store Kimchi buttons on both compartments simultaneously, which causes all LEDs on the right compartment fermentation remaining time display except the time LED to illuminate.

A reset may temporarily clear the E3 code from the display, but the error will return if the underlying sensor fault is not corrected. Because E3 reflects an active circuit fault, the control board will re-detect the problem and re-trigger the code once it resumes normal monitoring. Proper repair of the sensor or wiring is required to permanently clear the error.

Repair costs vary depending on the specific failed component. If only the wiring or connector needs attention, costs may be limited to a service call fee in the range of $75 to $150. If the sensor or display assembly requires replacement, parts and labor combined can range from $150 to $400 or more depending on the model and your location.

Start by checking the sensor resistance at pins 2 and 5 of connector CON5 on the control board using a multimeter. If the resistance is out of the expected range, the sensor has likely failed and needs to be replaced. Also inspect the wiring harness and connector at CON5 for damage or corrosion, as connection issues can produce the same error without the sensor itself being defective.

A faulty outside temperature sensor can affect the refrigerator's ability to regulate temperature accurately, which may compromise food safety over time. While the unit may continue to run, it is advisable to have the fault diagnosed and repaired promptly. Monitor internal temperatures with a thermometer until the repair is completed.