LG Refrigerator Error Code Error2

Error2 means the R1 temperature sensor located in the upper part of the refrigerator compartment is reading abnormally, indicating either a short circuit or an open circuit. The control board cannot get a valid temperature reading from this sensor and flags the error to alert you to the problem. The primary diagnostic step is to check resistance at CON9 pins 5 and 6 where the sensor connects to the board. Without a working sensor, the refrigerator cannot properly regulate compartment temperature.

Running the refrigerator with an active Error2 code means the control board cannot accurately monitor the upper compartment temperature. This creates a risk of inadequate cooling, which could allow food to reach unsafe temperatures without any visible indication. It is best to minimize use and address the fault promptly to avoid potential food spoilage.

A power reset may temporarily clear the Error2 display, but the code will return if the underlying fault with the R1 sensor or its wiring has not been corrected. Resetting is useful for confirming whether the error is persistent or intermittent, but it is not a fix. The sensor circuit at CON9 pins 5 and 6 must be inspected and repaired to permanently resolve the error.

A knowledgeable DIYer can perform basic diagnostics such as inspecting the wiring harness and connector at CON9 for visible damage or corrosion. Measuring resistance across CON9 pins 5 and 6 with a multimeter will confirm whether the sensor has failed. Replacing the R1 thermistor sensor is a moderately straightforward repair, but if the control board is the culprit, professional service is recommended.

If the issue is limited to the R1 thermistor sensor, parts typically range from $15 to $60 depending on the specific model, with professional labor adding $80 to $200. If the wiring harness needs replacement, costs can be higher. A failed control board is the most expensive repair, with parts and labor potentially totaling $200 to $500 or more.