The Er FF error code signals that your freezer fan is stuck or broken. I usually see this when ice buildup physically blocks the fan blades or the motor itself has burnt out from excessive moisture.
If you're ignoring this code, your compressor's working overtime trying to compensate for zero airflow, and I've seen that shorten a compressor's life by a couple years easy. Most of the time it's frost seizing the fan, which a 30-minute defrost clears right up. But if the motor's burned out, you're looking at a part swap. Don't sit on this one.
So here's what's going on: that evaporator fan behind your freezer's back panel has either seized up from ice or the motor's dead. It's actually one of the more common LG service calls I get, especially on the French door models from 2015-2020. Parts are usually under $80 if you do it yourself, and honestly it's not a bad DIY job if you're comfortable with a screwdriver and a multimeter.
Most Likely Causes
Based on aggregated repair data, here is the probability breakdown for this error code:
Ice buildup blocking fan blades65%
Faulty evaporator fan motor25%
Defective main control board7%
Wiring harness damage3%
Symptoms You May Notice
Your fridge section feels like room temperature while the freezer still seems cold, because all that cold air has nowhere to go without the fan pushing it through.
A loud chirping or grinding noise coming from the back wall of the freezer, which is the fan blades clipping ice on every spin before they eventually seize up completely.
The Er FF code on the display, sometimes flashing and sometimes solid depending on your specific model.
Food near the back of your fridge is freezing solid while stuff near the front is warm, which is a classic airflow distribution problem.
The freezer seems fine for a few hours after you reset it, then goes warm again as the fan re-ices and locks up.
Can you reset a Lg refrigerator to clear the Er FF code?
Unplug the refrigerator for 60 seconds, then plug it back in. If the code's gone, let it run for 24 hours to make sure the fan stays clear. On models with a full control panel, press and hold Refrigerator and Ice Plus together for 5 seconds to force a soft reset without unplugging. Display should go blank and then restart with no code showing.
Tools Required for Diagnosis
Phillips #2 screwdriver5/16 inch nut driverDigital multimeterSteam cleaner or hair dryerFlathead screwdriver for prying plastic tabsFlashlightTowels or a shallow pan to catch meltwaterDielectric greaseElectrical contact cleaner
Service / Diagnostic Mode
Press and hold the Refrigerator and Ice Plus buttons simultaneously for 3 seconds until the display changes to test mode. Press Refrigerator repeatedly to cycle through component tests. When FF appears, the freezer fan test is active and you can watch the fan response in real time.
Diagnostic Checklist
Follow these steps in order. We start with the easiest external fixes before opening up the machine.
ComponentComponent Under Test
Expected Range10–80 ohms
ConditionIf Open (OL) or infinite, replace component.
Frequently Asked Questions
Can I just reset the LG Er FF error code?
You can unplug it for a minute and the code'll clear, but if the fan's still blocked or the motor's dead, that code's coming right back. Sometimes within an hour, sometimes a day. Reset is a diagnostic tool, not a fix. If it clears and stays clear for more than 24 hours, you probably had a temporary ice blockage that resolved itself. If it comes back, you've got a real problem to dig into.
Why did ice build up and block my freezer fan?
Almost always one of two things: either the defrost heater element died and ice just kept accumulating over a couple weeks until it reached the fan, or somebody left the freezer door open long enough for warm humid air to rush in and freeze solid on those cold coils. The defrost system is supposed to run a heating cycle every 6 to 8 hours to prevent exactly this. When it fails, you don't notice for a while because the fan fights through small amounts of frost. Then one day it just can't anymore and the code fires.
Is it safe to keep food in the fridge with an Er FF code?
Not for long. Without that fan circulating air, the fridge section is going to climb toward room temperature pretty quick, sometimes within 4-6 hours. The freezer might hold temps a bit longer since cold air is dense and stays put, but eventually that goes too. High risk stuff like meat, dairy, and anything with eggs needs to come out now. Hard cheeses, condiments, stuff like that can probably tolerate it for a few hours but I wouldn't push past that.
How much does it cost to replace an LG evaporator fan motor?
DIY you're looking at $40-80 for the part depending on your model. LG part numbers EAU61524007 and EAU33638601 cover most of the French door models built between 2014 and 2021. Figure 45 minutes to an hour of actual work if it's your first time doing it. Having a tech do it, you're probably at $250-$400 total with the service call fee plus labor. It's one of those repairs that's genuinely worth doing yourself if you're even a little bit handy.
Why is my refrigerator making a loud chirping noise before the Er FF code?
That chirping is the fan blade clipping ice on every rotation. It's the last warning before the fan seizes completely. Catch it at this stage and you might save the motor because the bearings aren't burned out yet. Just do the manual defrost, clear the ice, and you could be done in an hour with no parts needed. A lot of people wait until the noise stops and then wonder why the code showed up, not realizing the noise stopping means the fan finally locked up completely.
What if the Er FF code comes back after I defrosted everything?
If you did a full defrost and the code came back within a week or two, your defrost system is almost certainly the real problem. The defrost heater, thermal limiter, or defrost thermostat isn't doing its job and ice is just re-accumulating. Check the defrost heater element for continuity first, it should read around 20-100 ohms. If that's open, replace the heater. If the heater's good, test the thermal limiter, which should read near zero ohms when cold. A failed limiter won't let the heater run at all, so frost just stacks up until the fan locks again.
Models Known to Experience Er FF Errors
This repair applies to most Lg refrigerators with this error code. Common model numbers include: