What rS Means
rS indicates the refrigerator-side temperature sensor has failed or lost contact, per LG's Help Library. LG lists this alongside FS as a fault requiring professional inspection rather than a homeowner fix.
Common Causes of rS
- Refrigerator-compartment temperature sensor has failed
- Sensor wiring connector has come loose or corroded
- Main control board fault is misreading the sensor
🔧 One Safe Check You Can Try
As with FS, the only safe self-help step is a full power-cycle: unplug the unit for about a minute, plug it back in, and see whether rS returns before requesting service.
⚠ Why You Shouldn't Go Further Than That
- The refrigerator-side sensor is mounted inside the fresh-food liner near the evaporator wall, not somewhere a warranty-conscious owner should be pulling panels to reach.
- A misdiagnosed sensor swap when the real fault is the control board means paying for a part that doesn't fix the problem.
- If rS is accompanied by warm food-compartment temperatures, delaying service risks spoilage beyond what a reset can fix.
Opening a panel to inspect or repair something yourself doesn't automatically cancel your manufacturer's warranty — but it can risk accidental damage, and some manufacturers do have specific service conditions. Check your product's warranty terms, or ask us, before deciding.