All LG Refrigerator error codes

21 codes From brand’s official support

Filter codes on this page…

Code	Meaning	Action
FS	Freezer temperature sensor fault	Needs a technician
rS	Fridge temperature sensor fault	Needs a technician
r2	Lower fridge temperature sensor fault	Needs a technician
dS	Defrost sensor fault	Needs a technician
rT	Ambient (outside) temperature sensor fault	Needs a technician
IS	Ice maker temperature sensor fault	Needs a technician
SS	Water tank temperature sensor fault	Needs a technician
dHFdH, dHF	Defrost system fault	Needs a technician
FF	Freezer fan motor fault	Needs a technician
rF	Fridge fan motor fault	Needs a technician
CF	Condenser fan motor fault	Needs a technician
IF	Ice maker fan motor fault	Needs a technician
It	Ice maker fault	Needs a technician
FU	Compressor / cooling cycle fault	Needs a technician
CO	Communication error (display ↔ main board)	Needs a technician
C1	Communication error (display ↔ main board)	Needs a technician
gF	Water flow problem	You can usually fix it
CH	Refrigerant leak detected	Stop & call technician
CL	Refrigerant leak detected	Stop & call technician
Lo	Temperature outside working range	Not a fault
HI	Temperature outside working range	Not a fault

How to see the error code

Codes show on the temperature display. On some models digits flash instead of the temperature, or the code appears with letters such as “Er”.

We write every explanation in our own words from these references.

Last checked: 2026-10-20

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