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LG Refrigerator Error Codes

16 error codes with causes and step-by-step fixes

Your LG refrigerator uses 16 distinct error codes to flag faults before they turn into a full breakdown. The most common cluster around sensor (6), motor (3), defrost (2). Of these, about 16 can usually be cleared at home without a technician, while 3 point to more serious faults that may warrant a professional. Typical repair costs on this appliance run from $0 for simple DIY fixes up to $480 for professional component replacement.

Find your code in the table below for its exact meaning, the most likely causes ranked by how often they're the culprit, a step-by-step fix, the parts you may need, and a clear call on when it's worth phoning a repair pro.

🔍 How to Enter Diagnostic Mode 🔄 How to Reset & Clear Codes

Code	Meaning	Severity	DIY	Est. Cost
Er FF	Freezer fan error — fan motor not operating	⚠ High Severity	moderate	$25–$65
Er dH	Defrost heater error — defrost cycle not completing	⚠ Medium Severity	moderate	$10–$80
Er CF	Condenser fan motor error	⚠ High Severity	moderate	$25–$60
Er FS	Freezer temperature sensor error	⚠ Medium Severity	moderate	$15–$40
Er IS	Ice maker sensor failure	⚠ Medium Severity	moderate	$15–$40
Er IF	Ice maker fan error	⚠ Medium Severity	moderate	$30–$70
Er CO	Communication error — main board to sub-board	⚠ Medium Severity	hard	$60–$150
dS	Defrost sensor open circuit	⚠ Medium Severity	moderate	$15–$40
Er rS	Refrigerator (fresh-food) compartment sensor error	⚠ Medium Severity	moderate	$15–$45
Er HS	Humidity sensor error	✓ Low Severity	moderate	$20–$55
Er gF	Flow sensor error — low water pressure or flow meter fault	⚠ Medium Severity	moderate	$30–$110
Er rF	Refrigerator fan error — fresh-food compartment fan not running	⚠ High Severity	moderate	$0–$60
Er SS	Freezer sensor error — freezer compartment thermistor out of range	⚠ Medium Severity	moderate	$0–$25
FS	Freezer sensor fault — freezer thermistor circuit open or shorted	⚠ Medium Severity	moderate	$0–$25
CO	Communication error — main board and display board not talking	⚠ Medium Severity	moderate	$0–$140
1F	Freezer (ice room) fan fault — icing fan circuit failure	⚠ Medium Severity	moderate	$0–$55

⚠️ Serious Errors — Act Quickly

Er FF

Freezer fan error — fan motor not operating

Er FF fires when the control board detects that the freezer evaporator fan motor…

Er CF

Condenser fan motor error

The control board monitors feedback (typically RPM or Hall-sensor pulses) from t…

Er rF

Refrigerator fan error — fresh-food compartment fan not running

Er rF fires when the control board stops receiving rotation feedback from the fr…

No Code on the Display?

Start from what the refrigerator is doing instead:

Refrigerator Not Cooling Refrigerator Ice Maker Not Working Refrigerator Freezing Food 💰 Refrigerator repair costs