LG Refrigerator Error Code r

The "r" error code on an LG refrigerator indicates a refrigerator compartment sensor failure, specifically either a short circuit or an open circuit in the temperature sensor circuit. The control board cannot get a valid resistance reading from the thermistor and triggers this code as a result. This fault prevents accurate temperature monitoring and can affect the refrigerator's ability to maintain proper cooling. Diagnosis starts at the CON4 connector and involves measuring resistance between the two White wires.

A power reset may temporarily clear the error code display, but if the underlying fault in the sensor circuit is still present, the "r" code will return once the control board runs its diagnostic checks again. A reset is not a fix and should only be used to confirm whether the fault is persistent or intermittent. The wiring and sensor resistance must be tested and corrected to resolve the code permanently.

If the fix is simply reseating a loose connector at CON4, there is no parts cost and only a service call fee if a technician is involved, typically in the range of $75 to $150 depending on your area. Replacing a faulty thermistor sensor is generally a lower-cost repair, with parts usually ranging from $15 to $50 and labor adding $100 to $200. If the wiring harness requires replacement, total costs can be higher depending on the extent of the damage and parts availability.

Checking and reseating the CON4 connector is a straightforward step that a careful DIYer can perform after unplugging the refrigerator. If the connector is secure, diagnosing the fault further requires a multimeter to measure resistance between the White wires at CON4. If the thermistor or wiring harness is confirmed faulty, replacing those components involves working inside the refrigerator liner and may require partial disassembly, which is better suited to a technician with appliance repair experience.

Operating the refrigerator with an active "r" error code is not recommended for extended periods, because the control board cannot accurately regulate the refrigerator compartment temperature without a functioning sensor. Food safety may be compromised if the compartment temperature drifts out of a safe range. It is best to address the fault promptly and monitor food temperatures closely in the meantime.