LG Refrigerator Error Code R2 sensor

The R2 sensor error means the control board has detected an abnormal reading from the secondary refrigerator temperature sensor, located in the mid-room area of the fresh food compartment. The fault indicates either a short circuit or an open circuit in that sensor or its wiring. This prevents the refrigerator from getting accurate temperature data for that section of the cabinet. The error is logged at connector CON7, where the sensor's gray wires connect to the system.

A failed mid-room sensor means the control board is missing temperature feedback from one part of the fresh food compartment, which can reduce cooling accuracy. Food safety may be at risk if the refrigerator is not maintaining proper temperatures as a result. It is advisable to check actual compartment temperatures with a thermometer and address the fault promptly rather than continuing to operate the unit in an unmonitored state.

If only the connector needs reseating, there is no parts cost involved. If the R2 thermistor sensor itself has failed, the replacement part typically costs in the range of $15 to $50 depending on the specific model. Adding professional labor for diagnosis and installation generally brings the total repair cost to somewhere between $100 and $250, though prices vary by region and service provider.

Many technicians and experienced DIYers can address this error by starting with connector CON7. Unplugging and firmly reseating the gray wire connector often resolves the fault if a loose connection is the cause. If the connector is secure, measuring resistance across the gray wires with a multimeter will help determine whether the thermistor itself needs to be replaced or whether the wiring harness is damaged.

A power reset may temporarily clear the error code from the display, but if the underlying fault in the sensor, connector, or wiring is still present, the code will return. Resetting should not be treated as a fix. The error will only remain cleared once the root cause, whether a loose connector, a failed thermistor, or damaged wiring, has been corrected.