ErrorCodeDoctor
LG · Refrigerator (Top Freezer)

LG Refrigerator (Top Freezer) FS error code

Difficulty: Hard · Cost: $80–$200 · Duration: Requires professional service

The FS error means your LG refrigerator has detected a fault with the freezer sensor — the component that monitors the temperature inside the freezer compartment. A short circuit or disconnection in the sensor means the refrigerator cannot accurately read the freezer temperature and stops operating normally to prevent food spoilage or damage to the cooling system. This error requires a professional technician to inspect and replace the faulty sensor.

Common causes

  • Freezer temperature sensor has developed a short circuit
  • Sensor wiring has become disconnected or damaged
  • Freezer sensor has malfunctioned or failed completely

How to fix it

  1. 1

    Unplug the refrigerator from the outlet and wait 5 minutes

  2. 2

    Plug it back in and check if the error has cleared

  3. 3

    If FS returns after resetting the freezer sensor or its wiring needs inspection and replacement by a technician

Related LG Refrigerator (Top Freezer) error codes

1

OF F

Demo mode is active — all cooling has been disabled

easy
2

rS

The refrigerator temperature sensor has a short circuit or disconnection

hard
3

dS

The defrost sensor has a short circuit or disconnection

hard
4

rT

The room temperature sensor has a short circuit or open circuit

hard

FS error — frequently asked questions

What does the FS error mean on a LG refrigerator (top freezer)?

The freezer temperature sensor has a short circuit or disconnection

What causes the FS error?

The FS error is usually caused by: Freezer temperature sensor has developed a short circuit; Sensor wiring has become disconnected or damaged; Freezer sensor has malfunctioned or failed completely.

Can I fix the FS error myself?

This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.

How much does it cost to fix the FS error?

Fixing the FS error on a LG refrigerator (top freezer) typically costs $80–$200, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my refrigerator (top freezer) with the FS error?

We'd recommend addressing the FS error before continuing to use the refrigerator (top freezer), since hard-rated issues often involve a real fault rather than a minor glitch.