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ER FS

LG Refrigerator

Severity:

Source: OnlyErrorCodes.com — Every error code. One place.

LG Fridge ER FS Error — Freezer Sensor Fix

What Does This Error Mean?

ER FS on an LG fridge means the freezer temperature sensor (thermistor) is reading abnormally — usually shorted or failed. The freezer cannot maintain temperature accurately. The sensor needs replacement to clear ER FS.

Affected Models

  • LG LFXS28968S
  • LG LRMVS3006S
  • LG LFXC22526S
  • LG LRFDS3006S
  • LG LRMDS3006S

Common Causes

  • Failed thermistor (NTC sensor) in the freezer compartment
  • Sensor wiring damaged or pinched against the cabinet
  • Moisture ingress at the sensor connector
  • Loose connector on the main control board

How to Fix It

  1. Move freezer food to a backup cooler.

    ER FS can cause the freezer to either run too cold (food rock-solid) or warm above safe levels. Move ice cream and high-value frozen items to a cooler with ice while you arrange repair.

  2. Unplug for 5 minutes and restart.

    A power cycle clears soft sensor faults. Some intermittent sensor reads from condensation clear after a power-on/off. If ER FS clears, monitor closely for return.

  3. Check freezer temperature with a thermometer.

    Place a fridge/freezer thermometer in the freezer for 4 hours. If it reads -18°C (0°F) accurately even with ER FS, the cooling is working — the sensor reading is the only issue and the fridge remains usable until repair.

  4. Book service for sensor replacement.

    An LG freezer thermistor costs USD 15–30 for the part. Labour is the bulk of the cost — typically USD 150–220 fitted. The sensor sits inside the freezer compartment and accessing it requires removing the rear cover.

Frequently Asked Questions

How long can I leave my LG fridge with ER FS?

If the freezer is still maintaining temperature (verify with a thermometer), you can use the fridge for several days while waiting for service. If the freezer is warming or freezing food rock-solid, treat it as urgent — call service the same day.

What is the difference between ER FS and ER RS on an LG fridge?

ER FS is the freezer compartment sensor. ER RS is the refrigerator compartment sensor. The fix approach is the same — sensor replacement — but the location and impact differ. ER RS warms the fridge; ER FS warms the freezer.