LG Refrigerator Error Code
The freezer compartment NTC thermistor is out-of-range or open. The compressor may run continuously in an attempt to reach the set temperature. Thermistor replacement is a quick repair.
Note the exact error code and any symptoms (sounds, smells, leaks)
Try power cycling the appliance (unplug for 60 seconds)
Check our diagnosis steps below
If code persists, call a certified technician
The freezer compartment NTC thermistor is out-of-range or open. The compressor may run continuously in an attempt to reach the set temperature. Thermistor replacement is a quick repair.
When your LG Refrigerator displays the Er FS code, it means the appliance's self-diagnostic system has detected a fault that requires attention. LG's smart diagnosis system is designed to surface this error only when the condition is confirmed — meaning a single power cycle that clears the code is not a reliable fix if the underlying cause has not been addressed.
Based on our technicians' experience servicing LG Refrigerators, the Er FS code is most frequently triggered by the following:
Before scheduling a service call, work through the following steps in order. These checks resolve the Er FS error in a meaningful percentage of cases when the cause is a minor blockage or transient fault rather than a failed component.
If the Er FS code returns after completing the steps above, a component has likely failed and the repair requires disassembly, professional diagnosis, and genuine LG OEM parts. Continuing to run the appliance with an active fault may cause secondary damage — for example, a failing drain pump that is not replaced can overheat and damage the motor or control board.
LG Appliance Experts technicians carry the most common replacement parts for LG Refrigerators on every service vehicle. In most cases, we can diagnose and complete the repair in a single visit.
Repair costs for the Er FS error vary depending on which component has failed. Typical ranges based on our service history:
All repairs include a 90-day parts and labor warranty. A written estimate is provided before any work begins.
Our certified LG technicians diagnose Er FS errors on the first visit.
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View service →Complete list of LG Refrigerator error codes with diagnosis guides.
| Code | Meaning | Severity | Common Symptom |
|---|---|---|---|
| CF | CF – Condenser Fan Motor Error | Medium | The condenser fan is not running. Without it, the compressor overheats and… |
| Er 1F | Er 1F – Refrigerator Sensor 1 Error | Medium | Refrigerator compartment sensor 1 is faulty. Found on LG side-by-side and column… |
| Er 2F | Er 2F – Refrigerator Sensor 2 Error | Medium | Refrigerator compartment sensor 2 (typically the return-air or ambient sensor) has failed.… |
| Er CO | Er CO – Communication Error | Medium | The main control board has lost communication with the display board. This… |
| Er dH | Er dH – Defrost Heater Error | Medium | The defrost heater circuit is open. Ice will accumulate on the evaporator… |
| Er FF | Er FF – Freezer Fan Motor Error | Medium | The freezer evaporator fan motor is not operating. Without this fan, cold… |
| Er gF | Er gF – Ice Maker Motor Error | Medium | The ice maker harvest motor or its gear assembly has failed. Ice… |
| Er HS | Er HS – Humidity Sensor Error | Medium | The humidity sensor inside the fresh-food section is faulty. This sensor helps… |
| Er IF | Er IF – Ice Maker Fan Error | Medium | The dedicated ice maker evaporator fan (on dual-evaporator models) is not running.… |
| Er IS | Er IS – Ice Maker Sensor Error | Medium | The ice maker temperature sensor is faulty or out-of-range. The ice maker… |
| Er rF | Er rF – Refrigerator Compartment Fan Error | Medium | The fresh-food section evaporator fan has failed. The refrigerator section will warm… |
Answers to the most common questions our customers ask.
LG refrigerators commonly experience a sealed-system failure (linear compressor issue), a failed evaporator fan motor, or a defrost system failure causing the evaporator coils to ice over completely. LG linear compressors are covered by a 10-year parts warranty on many models — we can verify your coverage.
Water inside the fridge usually comes from a blocked defrost drain tube — ice forms in the drain pan and water overflows into the fresh-food section. Water under the fridge suggests a cracked or overflowing drain pan or a faulty ice maker water line. Both are same-day repairs.
Er dH means the defrost heater circuit is open or the defrost thermostat has failed. The evaporator coils will frost over completely, blocking all airflow and causing the unit to stop cooling. This is one of the most common LG refrigerator repairs and is typically a 1–2 hour job.
Yes. LG linear compressors in certain French Door models produced between 2014–2019 have an elevated failure rate. LG extended the compressor warranty to 10 years on affected models. Our technicians are certified to diagnose and replace LG compressors and can check your serial number for warranty eligibility.
The InstaView panel requires two quick knocks within 1 second to illuminate. If it stops responding, the InstaView board, the knock sensor, or the LED panel itself may have failed. This is an LG-specific repair that requires genuine LG InstaView components.
Common causes: the ice maker arm/bail is raised to the OFF position, the water supply shut-off behind the fridge is closed, a clogged water filter (replace every 6 months), a frozen fill tube, or a failed water inlet valve. We diagnose all LG ice maker types including Craft Ice and standard tray makers.
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