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LG Refrigerator Er FS Error Code

Temperature sensor fault. What it means, which models show it, and how to clear it, easiest fix first.

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Er FS
May need a pro

One of the fridge's temperature sensors is shorted or disconnected, so the control cannot read that area correctly and cooling may be less accurate. Er FS is the freezer sensor, Er rS the fridge sensor, Er dS the defrost sensor and Er rT the room (ambient) sensor.

Compatible models

LG doesn't publish a model list for this code; it appears on LG refrigerators with a digital display. Check your owner's manual.

Also shown as

Grouped codes: FS, rS, r2 (lower fridge sensor), dS (also F dS or r dS), rT, SS (pantry or water tank sensor, depending on model) and HS (humidity sensor). Check your manual for which sensors your model has.

Difficulty

Try the basic checks, but the usual fix is a technician's job.

Safety first: unplug the refrigerator (or switch off its breaker) before touching filters, hoses or panels. If you smell burning or gas, or see water near the outlet, stop and call a professional.

How to fix LG Er FS

  1. Reset the power

    Unplug the refrigerator for about 5 minutes, then plug it back in and see if the code clears.

  2. Watch the temperatures

    Place an appliance thermometer in the affected section. Move food to a cooler if the fridge rises above 40°F (4°C) or the freezer above 0°F (-18°C).

When to call a technician

Sensor faults need a technician to test and replace the part. Request service if the code returns after a reset.

Parts linked to Er FS

These are the parts most often behind this code. Tap one to see what it does and the signs it is failing.

Order parts by your full model number so they fit.

Frequently asked questions

What does Er FS mean on a LG refrigerator?

One of the fridge's temperature sensors is shorted or disconnected, so the control cannot read that area correctly and cooling may be less accurate. Er FS is the freezer sensor, Er rS the fridge sensor, Er dS the defrost sensor and Er rT the room (ambient) sensor.

Which LG models show the Er FS code?

LG doesn't publish a model list for this code; it appears on LG refrigerators with a digital display. Check your owner's manual.

Can I fix LG Er FS myself?

Only the basic checks. You can safely try the steps above, but Er FS usually points to a part or fault that needs a technician.

What if Er FS keeps coming back?

A code that returns after a reset and the checks above usually means a part is wearing out. Note when Er FS appears (which cycle, how often) and have your model number ready; it helps a technician bring the right part on the first visit.

Other LG refrigerator codes

Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.

Sources we checked