LG Refrigerator Error Code rS

The rS code on an LG refrigerator indicates that the refrigerator compartment temperature sensor has experienced a short circuit or open circuit failure. The control board detected an abnormal voltage at the sensor test points, either 0V for a short or 5V for an open. This prevents the refrigerator from accurately monitoring the temperature inside the fresh food section. The fault needs to be diagnosed and repaired to restore normal operation.

It is not advisable to rely on the refrigerator for extended food storage while the rS code is active, since the control board cannot accurately read or regulate the fresh food compartment temperature. Food safety could be compromised if temperatures rise above safe levels without the refrigerator detecting it. Address the fault as soon as possible, and in the meantime use a standalone thermometer inside the compartment to monitor conditions.

A reset may temporarily clear the rS code from the display, but it will return if the underlying sensor fault has not been corrected. The control board will re-detect the short or open circuit condition the next time it polls the sensor. A reset can be useful to confirm whether a fault is intermittent or consistent, but it is not a permanent fix. The sensor circuit must be tested and the root cause repaired for the code to stay cleared.

Some causes of the rS code are DIY-friendly, such as reseating a loose connector or performing a manual defrost to clear ice from around the sensor. If the wiring or thermistor itself has failed, replacing the sensor requires basic electrical knowledge and comfort working inside the refrigerator cabinet. Testing the voltage at POINT C and POINT D with a multimeter will help confirm whether you are dealing with a short or open circuit before purchasing parts.

If only the thermistor needs replacement, parts typically range from around $15 to $50 depending on the specific model, and a DIY repair keeps costs low. If a technician is needed, the total cost including labor generally falls in the $100 to $250 range. More extensive wiring repairs or control board issues would push costs higher. Getting a firm diagnostic first helps avoid paying for parts that are not the root cause.