LG Refrigerator Error Code R-SENSOR

R-SENSOR indicates a fault with the refrigerator compartment temperature sensor circuit. The error appears when the sensor reports a temperature that is not within the valid range of -58°F to 122°F, signaling a problem such as a cut wire, short circuit, contact failure, or missing sensor housing. The main PCB cannot receive a reliable temperature reading, which disrupts normal cooling control.

Operating the refrigerator with an active R-SENSOR error is not recommended for extended periods. Without a functioning compartment sensor, the main PCB cannot accurately regulate cooling in the fresh food section, which means temperatures could rise and food safety could be compromised. Address the fault as soon as possible to avoid spoilage.

Repair costs vary depending on the root cause. Replacing a refrigerator compartment thermistor sensor typically runs between $20 and $80 for the part, while a new wiring harness can range from $30 to $100. If the main PCB is involved, board replacement can cost between $150 and $350 or more. Adding professional labor generally brings total repair costs to a range of $100 to $400 depending on the diagnosis.

Some causes of the R-SENSOR error are DIY-friendly, such as reseating a loose connector or reinstalling a dislodged sensor into its housing. However, testing voltage at the main PCB connector CN 30 pins No. 10 and No. 14 requires a multimeter and some comfort with electrical diagnostics. Replacing a damaged harness or the sensor itself is also manageable for experienced DIYers, but if the fault traces back to the main PCB, professional service is recommended.

A power reset may temporarily clear the error code display, but the code will return if the underlying fault in the sensor circuit has not been corrected. The error is triggered by an out-of-range voltage condition at the sensor circuit, so it will persist until the wiring, connector, or sensor is repaired or replaced.