LG Refrigerator Error Code IS E

IS E is an icing sensor error code indicating that the refrigerator has detected a short circuit or open circuit in the ice maker sensor circuit. The code appears on the display without any user input, meaning the control board flagged the problem on its own. It points to a fault somewhere in the sensor, its wiring, or the connector at Display PCB CON101 pins 1 and 2.

A reset may temporarily clear the IS E display, but the code will return if the underlying sensor fault is still present. Because the refrigerator detects and displays this error automatically without user input, it will reappear as soon as the control board checks the icing sensor circuit again. A permanent fix requires diagnosing and correcting the short or open circuit in the sensor wiring.

If the fix is simply reseating a loose connector, there is no parts cost involved. If the icing sensor itself needs replacement, parts typically range from $15 to $50 depending on the model, with professional labor adding $80 to $200 or more depending on your location and the service provider. Wiring harness repairs or a Display PCB replacement will generally cost more.

Some cases of IS E can be resolved without replacing parts. Start by checking that the sensor connector is fully seated and free of corrosion or damage. If the connector looks fine, you will need a multimeter to test resistance at Display PCB CON101 pins 1 and 2. If the reading is open or shorted, the sensor or harness will need to be replaced, which requires moderate DIY skill and comfort working with refrigerator wiring.

The IS E error specifically affects the ice maker sensor circuit, so the refrigerator's main cooling functions typically continue to operate. However, ice maker operation may be unreliable or completely disabled while the fault is active. It is safe to keep food stored in the refrigerator and freezer, but you should address the error promptly to restore normal ice production.