A guide to error codes and status messages on LG Refrigerators, with documented meanings, safe checks and when to call a technician. Codes vary by model and market.
- Codes can differ between models and markets; your model's manual is the primary reference.
- Some display messages are status notices or features (like child lock CL), not faults.
- On some displays the code is preceded by Er (e.g. Er FF on refrigerators).
- Restarting after unplugging for a minute may clear a code temporarily, but if it returns there's a cause to fix.
Codes
Freezer fan fault
Error codeThe freezer fan isn't working properly.
Possible causes
- Ice obstructing the fan
- Motor failure
Safe checks you can do
- Note the code
Request service as LG advises. The technician checks the fan and defrost.
Related guides
Condenser fan fault
Error codeThe condenser fan (usually rear bottom) isn't working properly.
Possible causes
- Dust or a trapped object
- Motor failure
Safe checks you can do
- Make sure there's ventilation behind the fridge
Request service as LG advises. The technician checks the fan and condenser.
Related guides
Freezer sensor fault
Error codeFreezer temperature sensor fault.
Possible causes
- Sensor or wiring fault
Safe checks you can do
- Note the code
Request service. The technician tests the sensor.
Related guides
Refrigerator sensor fault
Error codeRefrigerator compartment sensor fault (upper R1).
Possible causes
- Sensor fault
Safe checks you can do
- Note the code
Request service. The technician tests the sensor.
Related guides
Defrost sensor fault
Error codeDefrost sensor fault.
Possible causes
- Sensor fault
Safe checks you can do
- Note the code
Request service. The technician tests the sensor and defrost system.
Related guides
Defrost failure
Error codeDefrost temperature didn't rise more than 5° within 80 minutes of starting defrost (also FdH or dHF).
Possible causes
- Defrost heater
- Thermal fuse
- Relays
- Blocked drain
Safe checks you can do
- Note the code
Request service. The technician checks heater, fuse, relays and drain.
Ice-maker fan fault
Error codeIce-maker fan blocked.
Possible causes
- Ice obstructing the fan
Safe checks you can do
- Note the code
Request service. The technician checks the fan and ice maker.
Related guides
Ice-maker sensor fault
Error codeIce-maker temperature sensor fault.
Possible causes
- Sensor fault
Safe checks you can do
- Note the code
Request service. The technician tests the sensor.
Related guides
Communication error
Error codeCommunication error between main board and display.
Possible causes
- Wiring or board
Safe checks you can do
- Note the code
Request service. The technician checks wiring and boards.
Related guides
Freezer not cold enough
Error codeFreezer not below 3.5° 10 minutes after starting, or rose above it during operation.
Possible causes
- Doors left open
- Blocked vents
- Gaskets
- Cooling fault
Safe checks you can do
- Unplug for 60 seconds and reconnect to a direct socket
- Confirm the compressor runs and the freezer is set to −18°
- Don't leave doors open or block vents; check gaskets
If the code persists. The technician checks compressor, fans and the cooling cycle.
Related guides
Water flow sensor fault
Error codeWater flow sensor fault.
Possible causes
- Low water pressure
- Kinked hose
- Sensor failure
Safe checks you can do
- Unplug for 60 seconds, reconnect to a direct socket and wait up to 5 minutes
- Make sure the valve is fully open, the hose straight and pressure adequate
If it persists. The technician checks the sensor and valve.
Related guides
Refrigerator fan fault
Error codeRefrigerator compartment fan fault.
Possible causes
- Fan failure
Safe checks you can do
- Note the code
Request service. The technician checks the fan.
Related guides
Other codes and messages
| Code | Meaning / action |
|---|---|
Demo / Display | Display/Demo mode — not a fault; cooling is disabled for showrooms. Disable as your manual describes. |
Lo / HI | Ambient below −10° or above +50°; the unit may not run optimally. |
r2 | Lower refrigerator sensor anomaly (R2). |
rT | Ambient temperature sensor fault. |
It | Ice-maker motor fault. |
SS | Water tank temperature detection issue. |
tt | Water tank missing, not seated or its sensor faulty. |
C1 | Communication error between dispenser and display. |
CH / CL | Refrigerant leak indicators (high/low side) — specialist technician only. Note: CL here differs from washer child lock. |
Fault guides
LG Refrigerator Not Cooling or Weak Cooling: Safe Checks Before a Technician
LG fridge not cooling or freezer not freezing? Display mode, settings, blocked vents, door seals, dusty condenser, CF and FF fan codes—and when to call a technician.
LG Refrigerator Ice Problems: Frost Build-Up, Ice Maker and Defrost
Frost building up in your LG freezer or the ice maker not working? Door seals and opening habits, defrost faults (dH), IF and IS codes, and safe checks.
LG Refrigerator Leaking Inside or Onto the Floor: Defrost Drain and Dispenser
Water under your LG fridge or in the crisper? Blocked defrost drain, dispenser line, levelling and door gaskets—with safe checks.
Unusual Noises From an LG Refrigerator: What's Normal and What Needs a Check
Clicking, humming or loud fan noise from your LG fridge? Learn the normal sounds of the compressor and defrost, and the ones that point to a fan or compressor needing a check.
FAQ
Are LG codes identical across models?
No. A code's meaning or form can vary by model, market and appliance type.
What if my code isn't listed here?
Check your model's manual, or send a photo of the display and the model on WhatsApp.
Can I ignore a code that disappears after restarting?
If it doesn't return it may have been transient, but repeated codes mean a cause needs fixing.
The code meaning was reviewed against these public LG support pages: