Written by
Maya Chen Editorial TeamPublished September 5, 2026Updated October 20, 2026
Error codedS (F dS, r dS)
ApplianceRefrigerator
Quick answer
dS on an LG refrigerator is a defrost temperature sensor fault, shown as dS, F dS or r dS depending on the model.
Model compatibility: LG reuses codes across series and model years, so dS (F dS, r dS) may mean something different on another appliance or generation. Confirm this against your model’s documentation and record your full model number before acting.
Plain language
What this code means
Defrost temperature sensor fault: the defrosting sensor is shorted or disconnected.
The dS code means the defrost temperature sensor in an LG refrigerator has a problem, described as a short or a disconnection of the defrosting sensor. It appears in three variations, depending on the model. LG does not name a series.
The three variations
dS: the plain defrost sensor fault
F dS: the freezer defrost sensor
r dS: the refrigerator defrost sensor
Why it matters
With a faulty defrost sensor the evaporator may become blocked by ice that forms from moisture in the air. Analog panels show the code with LEDs at -15°C, -17°C, -20°C and -23°C. The sensor connections are what a technician checks.
LG lists no troubleshooting for the owner and says the unit needs a repair service.
If dS stays on an LG refrigerator in Los Angeles, call (310) 742-8008. Have the code, the model number and anything you already tried in front of you. Details on LG refrigerator repair are online.
Important safety warning. Do not attempt repairs involving electrical components, gas, water lines, refrigerant or sealed systems. Unplug the appliance if it is safe to reach the outlet, and leave internal diagnostics to a qualified technician.
Seeing this code on your LG appliance?
Book a specialist visit for a clear estimate and approval before any repair.
