FS Moderate Moderate DIY

LG Refrigerator FS — Freezer sensor (thermistor) error

LG Refrigerator · Error code FS

What FS Means

Freezer sensor (thermistor) error.

Most Likely Fix

Freezer sensor (thermistor) error

PartFreezer section thermistor
Typical cost$15-35
Difficultymoderate
Time45 min

Tools: screwdriver, multimeter

Diagnose first: Same family as the refrigerator thermistor; failure causes warm freezer or false defrost timing.

Find this part on Amazon →

Symptoms

  • FS shown on the display
  • Freezer sensor (thermistor) error

Common Causes

1
Most likely: Freezer section thermistor

Same family as the refrigerator thermistor; failure causes warm freezer or false defrost timing.

How to Fix It

  1. Same family as the refrigerator thermistor; failure causes warm freezer or false defrost timing.
  2. If diagnosis confirms the fault, replace the freezer section thermistor (typical cost $15-35, about 45 min, moderate DIY).

Parts You May Need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

Common replacement Freezer section thermistor View on Amazon→

More LG Refrigerator Codes

22 22 — Compressor relay / inverter control fault 33 33 — Compressor / defrost test fault 67 67 — Door open / not fully closed 88 88 — Power-on display test (not a fault) Er CF Er CF — Condenser Fan Fault Er CO Er CO — Compressor / Communication Fault

All LG codes → All refrigerator codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.