LG Refrigerator Error Codes

The display shows Er FF. The freezer feels warm. This guide explains LG refrigerator error codes in plain words.

LG fridges use Er codes for faults. Two letters follow the Er. Each pair points to one part. Fan codes are the most common. Sensor codes come next. Sealed system faults are rare and serious. The chart below gives the quick answer. The sections after it walk through each code.

LG Refrigerator Error Codes: Quick Chart

Code	What it means	Fix it yourself?
Er FF	Freezer fan motor failed	Often, defrost first
Er RF	Refrigerator fan motor failed	Often, defrost first
Er IF	Ice compartment fan failed	Often, defrost first
Er dH	Defrost heater failed	No, call a technician
Er FS / Er RS	Freezer or fridge sensor fault	Sometimes, sensor swap
Er CO	Main board and display lost contact	No, call a technician
Er CF	Condenser fan motor failed	Clean coils first
Er 15	Ice maker fan motor failed	Sometimes, defrost first

Code sets vary by model and year. Your owner’s manual beats any online list. Write down the full code before you reset anything.

How to Reset an LG Refrigerator

Unplug the fridge for two to five minutes. Plug it back in and watch the display. Many fan codes clear when the cause was temporary ice. The LG ThinQ app also runs Smart Diagnosis. Hold your phone to the fridge speaker when the app prompts you. The app reads the tones and names the fault. A code that returns after a reset is a real fault. Do not keep resetting it. Find the cause instead.

Fan Codes: Er FF, Er RF, and Er IF

These three codes mean a fan stopped turning. Fans push cold air through each section. Ice or frost often blocks them. A worn motor is the other cause. The fix path is the same for all three.

Er FF: Freezer Fan Failed

Er FF means the freezer fan motor failed or jammed. The freezer warms first. Frost on the back wall is the usual suspect. Unplug the fridge and leave the freezer door open for eight hours. Towels catch the melt water. Plug it back in. If Er FF returns within a day, the motor itself is bad. A tech can swap a fan motor in one visit.

Er RF: Refrigerator Fan Failed

Er RF means the fridge section fan failed. The freezer stays cold. The fridge section warms up. The same defrost trick applies. Check that food is not packed against the back wall vents. Blocked vents fake a fan failure. If airflow stays weak after a defrost, the motor needs replacement.

Er IF: Ice Compartment Fan Failed

Er IF means the fan in the ice maker compartment failed. Ice production stops. Frost builds around the ice maker housing. French door models show this code most. A full manual defrost clears frost jams. If the fan never restarts, the motor or its wiring needs a tech.

Er dH: Defrost Heater Trouble

Er dH means the defrost cycle failed. The heater melts frost off the evaporator coils. When the heater dies, ice builds up over days. Airflow drops. Cooling fades slowly, which fools people. The fridge seems fine until food spoils. This repair reaches into wiring near the sealed system. It is not a DIY job. Call a technician.

Er CO and Er CF: Board Talk and Condenser Fan

Er CO means the display and the main control board lost contact. A loose harness causes it sometimes. A failed board causes it other times. Either way, this needs a tech with the right diagnostics. Er CF means the condenser fan failed. This fan cools the compressor and coils. Pull the fridge out and vacuum dust from the coils first. Heavy dust overheats the fan and trips the code. If the fan still will not spin after cleaning, it needs replacement.

The LG Linear Compressor Error

LG linear compressors fail more than most compressor designs. There is no single display code that names it. Watch for the signs instead. Both sections warm at once. The compressor clicks and never quite starts. The compressor body runs very hot. Food spoils while the display looks normal. A sealed system repair follows. Only a licensed technician should open a sealed system. Federal rules cover refrigerant handling. Here is the part most owners miss. LG covers linear compressor parts for 10 years on many models. Parts are free. Labor is not. After the first year, you pay the labor on a long sealed system job. Ask for the labor price in writing before you approve the work.

Protect Your Food First

A fridge above 40 degrees for two hours is unsafe for perishables. That is the FDA rule. Toss milk, meat, and leftovers past that line. Keep both doors closed to hold the cold. Move food to coolers with ice if the repair waits until tomorrow. A fridge thermometer ends all guessing. Keep one on the middle shelf.

When to Call a Technician

Call for Er dH, Er CO, and any compressor sign. Call when both sections warm together. Call when the code returns after a full defrost and reset. Have your model number ready from the sticker inside the fridge wall. Tell the tech the exact code and what you already tried. Most fan and sensor jobs finish in one visit. Sealed system jobs take longer and need the right license.

Code That Will Not Clear?

Tried the reset and the defrost, and the code keeps coming back? Book LG refrigerator repair and tell us the exact code when you call (+1 (888) 206-0056). Fan, sensor, and sealed system faults get diagnosed in one visit. We serve Milwaukee, Sacramento, and Grand Rapids. See all areas we serve. If the fridge runs but will not cool, our fridge not cooling guide covers the full diagnostic tree. Strange sounds along with the code? Check our fridge noise guide.