All LG Refrigerator Error Codes — Complete Troubleshooting Guide (2026)
This comprehensive guide covers every known LG Refrigerator error code — 9 codes total. Each error includes what it means, how to fix it yourself, and when you should call a professional technician.
Detailed Error Code Guides
Error Er CF: The LG refrigerator error code Er CF tells you the condenser fan motor isn’t working correctly. When the fan can’t move air over the condenser coils, the unit may run warm or stop cooling altogether.
Step‑by‑step guide to fixing LG refrigerator error Er CF. Includes tools, parts, cost estimate, safety tips, and maintenance advice.
- Power‑cycle the refrigerator
- Move the fridge and remove the coil cover
- Vacuum the condenser coils
- ...see all 9 steps →
Tools needed: Phillips #2 screwdriver, Torx T10 screwdriver (most LG models), Multimeter with continuity and voltage settings, Vacuum with brush attachment, Insulated gloves, Small flat‑head screwdriver
Read full troubleshooting guide →Error Er CO: The Er CO code tells the fridge’s main control board that it cannot exchange data with the freezer or ice‑maker board. The refrigerator may still run, but temperature regulation becomes erratic, and the ice maker often stops working.
Fix LG Refrigerator error Er CO (communication error between PCBs) with our step‑by‑step guide. Learn symptoms, root causes, DIY repair steps, parts cost,...
- Quick Check – Power Cycle the Unit
- Verify Wiring Connections Between PCBs
- Test the Communication Line with a Multimeter
- ...see all 8 steps →
Tools needed: Phillips #2 screwdriver, Flat‑head screwdriver (size 5mm), Digital multimeter (with continuity test), Non‑metallic insulated gloves
Read full troubleshooting guide →Error Er dH: The Er dH code tells the LG refrigerator’s control board that the defrost heater circuit has failed. It appears when the heater does not warm during the scheduled defrost cycle, leading to excess frost, reduced cooling efficiency, and possible ice‑maker problems.
Fix the LG Refrigerator Er dH defrost heater error with clear steps, cost guide, warranty info, and safety tips.
- Power cycle the refrigerator
- Locate the defrost heater and thermostat
- Test heater continuity with a multimeter
- ...see all 9 steps →
Tools needed: Phillips #2 screwdriver, T15 Torx screwdriver, Digital multimeter, Nut driver set
Read full troubleshooting guide →Error Er FF: The Er FF code indicates a problem with the freezer fan motor. When the fan stops, the freezer can’t circulate cold air, so the freezer and fresh food sections may become too warm or develop frost. The error appears on the display and often triggers a diagnostic beep.
Fix LG Refrigerator error Er FF quickly. Learn why the freezer fan motor fails, see step‑by‑step repair, parts cost, and when to call a pro. Get your fridge..
- Quick Check – Power Cycle the Refrigerator
- Confirm the Fan Isn’t Running
- Inspect the Fan Motor Wiring
- ...see all 7 steps →
Tools needed: Phillips #2 screwdriver, T10 Torx screwdriver, Multimeter (digital, with continuity function), Nut driver set (5 mm and 6 mm), Flat‑head screwdriver (small)
Read full troubleshooting guide →Error Er FS: The Er FS code tells the LG refrigerator’s control board that the freezer temperature sensor is out of range or not responding. When the sensor fails, the freezer may stop cooling, which can cause the fresh‑food compartment to become too warm.
Fix LG Refrigerator error Er FS (Freezer sensor error) with our step‑by‑step guide. Learn symptoms, causes, tools, costs, and when to call a pro.
- Quick Power Reset
- Verify the Freezer Temperature Setting
- Inspect the Sensor and Wiring
- ...see all 7 steps →
Tools needed: Phillips #2 screwdriver, Digital multimeter with resistance and continuity functions, T20 Torx driver, Flat‑head screwdriver (3 mm)
Read full troubleshooting guide →Error Er IF: The Er IF code tells the refrigerator’s control board that the ice‑maker blower fan motor isn’t turning or is drawing too much current. The board shuts the motor down to protect it from overheating.
Fix the LG Refrigerator error Er IF (ice maker blower fan motor error) fast. Learn symptoms, root causes, step‑by‑step repair, parts cost, and when to call...
- Quick Reset – Power Cycle the Refrigerator
- Inspect the Ice Maker Compartment for Ice Build‑Up
- Access the Blower Fan Motor
- ...see all 6 steps →
Tools needed: Phillips #2 screwdriver, T15 Torx screwdriver, Digital multimeter, Nut driver set (5 mm and 6 mm)
Read full troubleshooting guide →Error Er IS: The Er IS code tells the refrigerator’s main control board that the ice‑maker temperature sensor isn’t responding or is reporting a temperature outside the expected range. When this happens the ice‑maker stops producing cubes to protect the motor and water valve.
Fix LG Refrigerator error Er IS (ice maker sensor error) fast with our step‑by‑step guide. Learn symptoms, root causes, DIY parts, cost estimates and when...
- Quick Power Reset
- Verify Ice Maker Power
- Inspect Water Supply and Filter
- ...see all 7 steps →
Tools needed: Phillips #2 screwdriver, T20 Torx screwdriver, Digital multimeter, Flat‑head screwdriver, 13 mm socket set
Read full troubleshooting guide →Error Er rS: The Er rS code tells the LG refrigerator’s main control board that the internal temperature sensor is out of range or not responding. The fridge may show the code on the display, stop cooling, or flash a warning light.
Fix LG Refrigerator error Er rS (sensor error) fast. Learn symptoms, root causes, step‑by‑step repair, parts cost, and when to call LG support. DIY guide...
- Quick Power Reset
- Enter Diagnostic Mode (Optional)
- Locate the Temperature Sensor
- ...see all 7 steps →
Tools needed: Phillips #2 screwdriver, Flat‑head screwdriver (3 mm tip), Digital multimeter (up to 20 MΩ resistance range), T20 Torx bit, Safety gloves, Dielectric grease
Read full troubleshooting guide →Error SYMPTOM‑NOT‑COOLING: The SYMPTOM‑NOT‑COOLING code appears when the refrigerator’s control board detects that the interior temperature is above the set point. In plain English, the fridge is running but the cold compartment isn’t getting cold enough, which can spoil food and waste energy. This error can be caused by a variety of issues, including a faulty temperature sensor, a malfunctioning evaporator fan motor, or a problem with the defrost timer.
Fix LG Refrigerator error SYMPTOM‑NOT‑COOLING with our step‑by‑step guide. Learn why the fridge isn’t cooling, quick reset tricks, part costs, and when to...
- Power‑Cycle the Unit (Quick Reset)
- Inspect Door Gaskets and Alignment
- Clean the Condenser Coils
- ...see all 7 steps →
Tools needed: Phillips #2 screwdriver, T20 Torx screwdriver, Digital multimeter with temperature probe, Nut driver set (5 mm, 8 mm), Vacuum with brush attachment
Read full troubleshooting guide →Common LG Refrigerator Problems
Beyond specific error codes, LG Refrigerator owners frequently encounter these issues:
- Error codes that keep coming back — Usually indicates the root cause wasn't fully addressed. Follow our complete repair guides above.
- Multiple error codes at once — Often points to a control board issue or power supply problem. Check our individual guides for related codes.
- Error code not listed here — Contact LG support directly or check your owner's manual. We update this guide as new codes are discovered.
LG Refrigerator Maintenance Tips
Prevent error codes before they appear with regular maintenance:
- Clean filters and drains monthly to prevent blockage errors
- Check water supply connections quarterly for leaks or kinks
- Run cleaning cycles as recommended in your owner's manual
- Keep the appliance level — uneven surfaces cause sensor errors
- Don't overload — excess weight triggers motor and balance errors
When to Call a Professional
While many LG Refrigerator error codes can be resolved with basic troubleshooting, call a certified technician if:
- The error persists after following all troubleshooting steps
- You see signs of electrical damage, burning smells, or water leaks
- The repair requires specialized tools or involves gas/electrical connections
- Your appliance is still under warranty — DIY repairs may void coverage