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LG Refrigerator Er FS Error Code
Temperature sensor fault. Here is what it means and how to clear it, easiest fix first.
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.
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.
How to fix LG Er FS
Reset the power
Unplug the refrigerator for about 5 minutes, then plug it back in and see if the code clears.
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 that commonly cause Er FS
- Freezer sensor
- Refrigerator sensor
- Defrost sensor
- Ambient sensor
Order parts by your exact model number so they fit.
Other LG refrigerator codes
- OFFFridge is in demo (display) mode
- Er FFFreezer fan is blocked or not running
- Er rFRefrigerator fan is not running properly
- Er dHDefrost cycle failed
- Er IFIce maker fan problem
- Er ISIce maker sensor fault
- Er ItIce maker motor or assembly fault
- Er gFWater flow sensor error
- Er COMain board and display are not communicating
- Er CFCondenser fan error
- Er CHSealed system (refrigerant) fault
- Er 22Compressor relay problem
- FUCooling cycle error
- Er 67Door not closing fully
- ttWater tank not detected
- SbSabbath mode is on
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.
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.
Last reviewed 2026-10-19. Codes and steps can vary by model; check your owner's manual.