Written by
Marcus Lindqvist Appliance Care EditorPublished October 26, 2026
VERIFIED
Error codeFS
ApplianceRefrigerator
FS at a glance
Fault: the freezer temperature sensor is shorted or disconnected.
Effect: the appliance performs less well.
Analog panels: the LEDs for -17°C, -18°C, -20°C and -23°C light up.
Listed for: LG refrigerators in general.
What the owner can do
Nothing is offered for FS in the way of troubleshooting. LG calls for a professional inspection and a repair service, where each sensor connection gets examined.
Codes that look alike
FF: a fan problem inside the freezer rather than a sensor.
FU: the freezer temperature went wrong during start-up or operation.
San Francisco and Bay Area households with FS on the display can book through (415) 223-7887. Have the model number and the exact code in front of you. Background on LG refrigerator repair is on the service page.
Model compatibility: LG reuses codes across series and model years, so FS 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
The freezer temperature sensor is shorted or disconnected, which lowers performance.
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.
You submit a request with your appliance model and symptom, we confirm an appointment window, and a technician performs an on-site diagnosis. You then receive a clear estimate and decide whether to proceed before any repair begins.
Yes. We provide an upfront estimate after diagnosis. No parts are ordered or installed until you approve the work, so there are no surprise charges.
Replacement parts are selected for the exact model and confirmed with you before ordering or installation.
Service areas are listed on the Locations page. Contact us with your ZIP code to confirm current coverage for your address.
Ready to get your LG appliance working again?
Book a repair online or call us — clear estimates and approval before any repair work begins.
