What do the LG Refrigerator error codes mean?
All LG refrigerator error codes explained with step-by-step fixes. Covers InstaView, French Door, and Side-by-Side models including Er IF, Er FF, Er CO, and more.
- Er IF — Ice Maker Fan Error
- Er FF — Freezer Evaporator Fan Error
- Er CF — Condenser Fan Error
- Er CO — Communication Error
- Er FS — Freezer Sensor Error
- Er RS — Fridge Sensor Error
LG Refrigerator Error Codes — Quick Reference#
| Code | Meaning | Severity | DIY? |
|---|---|---|---|
| Er IF(Er 1F) | Ice Maker Fan Error | high | Pro Only |
| Er FF | Freezer Evaporator Fan Error | high | DIY OK |
| Er CF | Condenser Fan Error | high | DIY OK |
| Er CO | Communication Error | high | Pro Only |
| Er FS | Freezer Sensor Error | high | Pro Only |
| Er RS | Fridge Sensor Error | high | Pro Only |
| Er DS | Defrost Sensor Error | medium | Pro Only |
| Er HS | Humidity Sensor Error | medium | Pro Only |
| Er IS | Ice Maker Sensor Error | medium | Pro Only |
| Er dH | Defrost Heater Error | high | Pro Only |
| Er IT | Ice Maker Motor Error | medium | Pro Only |
| Er gF | Flow Sensor Error | medium | Pro Only |
| Er rT | Room Temperature Sensor Error | medium | Pro Only |
| Er SS | Pantry Sensor Error | medium | Pro Only |
| Er CL | Door Not Closing Properly | medium | DIY OK |
| Er Comp | Compressor Error | critical | Pro Only |
| Er DI | Ice Dispenser Error | medium | DIY OK |
| Er FO | Fan Obstruction Error | high | DIY OK |
| 67 | Door Ajar | low | DIY OK |
| Er SH | Shelf Heater Error | medium | Pro Only |
LG Refrigerator Broken? Same-Day Diagnostic Available
Our certified technicians serve the Bay Area and Sacramento. Free diagnostic visit — we identify the problem, quote the repair, and fix it on the spot in most cases. No hidden fees.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Er IF — Ice Maker Fan Error#
Common Causes
- Fan motor failure(common) — The small fan motor in the ice maker compartment burns out, preventing airflow needed for ice production.
- Ice buildup blocking fan(occasional) — Frost accumulates around the ice maker fan blades due to a door seal issue or humid air infiltration.
- Wiring issue(rare) — The wire harness to the ice maker fan loosens at the connector.
Professional Repair
Estimated Cost
$180-280
Repair Time
45-60 minutes
The ice maker fan is inside the freezer compartment behind the ice maker housing. Accessing it requires removing the ice maker assembly and rear panel. In our Sacramento service calls, LG ice maker fan issues are the second most common refrigerator repair.
Er FF — Freezer Evaporator Fan Error#
Common Causes
- Ice buildup blocking fan(common) — Frost on the evaporator fan blades prevents rotation. Often caused by a failing door gasket or defrost system issue.
- Fan motor failure(occasional) — The DC evaporator fan motor burns out after 6-10 years of continuous operation.
DIY Fix
Warning
Do not use sharp tools to chip ice near the evaporator coils.
Place towels at the base of the unit to catch melt water.
- Remove all food from the freezer and store in coolers with ice packs.
- Unplug the refrigerator and leave the freezer door open for 8-12 hours.
- Optionally use a hair dryer on low heat to speed thawing around the fan area (behind the rear panel).
- Plug back in and listen for the fan (a soft humming from inside the freezer).
- If the fan does not start, the motor needs professional replacement.
Professional Repair
Estimated Cost
$180-280
Repair Time
45-60 minutes
If manual defrost does not resolve the issue, the fan motor needs replacement. Requires removing the freezer rear panel and working around the evaporator.
Er CF — Condenser Fan Error#
Common Causes
- Dirty condenser coils/fan(common) — Dust, pet hair, and debris accumulate on the condenser coils and fan (located at the bottom-rear), blocking airflow and causing the fan motor to overheat.
- Fan motor failure(occasional) — The condenser fan motor burns out from overheating due to restricted airflow.
DIY Fix
Warning
Unplug before cleaning. The condenser fan can start automatically.
- Unplug the refrigerator.
- Remove the bottom front grille (snap or screw-mounted).
- Vacuum the condenser coils and fan area thoroughly.
- Use a condenser coil brush for hard-to-reach areas.
- Check that the fan blade spins freely by hand.
- Reinstall the grille and plug back in.
Professional Repair
Estimated Cost
$150-250
Repair Time
30-45 minutes
If cleaning does not resolve Er CF, the fan motor needs replacement. The condenser fan is at the bottom-rear of the refrigerator.
LG Repair Tools Required
DIY tool investment: $0+ just for basics. Our technician arrives with $15,000+ in professional tools — your diagnostic is free.
Er CO — Communication Error#
Common Causes
- Main board failure(common) — The main control PCB loses communication with the display board or compressor inverter.
- Wiring harness damage(occasional) — The wire harness between the main board and display is damaged, often through the door hinge on French Door models.
Professional Repair
Estimated Cost
$250-400
Repair Time
45-60 minutes
Requires systematic testing of both boards and interconnect harness. On LG French Door models, the hinge wiring is a known failure point. Based on our Bay Area repair data, the main board is the culprit 55% of the time.
Er FS — Freezer Sensor Error#
Common Causes
- Thermistor failure(common) — The freezer temperature sensor drifts out of spec or fails open/shorted, sending incorrect readings.
- Wiring issue(occasional) — The sensor wire connector loosens or the harness is damaged by ice expansion.
Professional Repair
Estimated Cost
$150-250
Repair Time
30-45 minutes
The freezer sensor is behind the rear panel inside the freezer. Accessing it requires removing shelves, ice bin, and the rear cover panel.
Er RS — Fridge Sensor Error#
Common Causes
- Thermistor failure(common) — The fresh food compartment temperature sensor fails, causing the compressor to run continuously or not at all.
- Connector issue(occasional) — The sensor connector vibrates loose over years of compressor vibration.
Professional Repair
Estimated Cost
$150-250
Repair Time
30-45 minutes
The fresh food sensor is behind the rear panel of the fridge compartment. Sensor resistance should read approximately 5k ohms at 77F.
Licensed & insured technicians, a free in-home diagnostic, and a 90-day repair guarantee — with our no-fix, no-fee promise, you only pay if we fix it.
Er DS — Defrost Sensor Error#
Common Causes
- Defrost sensor failure(common) — The bi-metal or NTC sensor that monitors evaporator temperature during defrost cycles fails.
- Wiring issue(occasional) — Thermal expansion and contraction cycles damage the sensor wiring.
Professional Repair
Estimated Cost
$150-250
Repair Time
45-60 minutes
Located on the evaporator behind the freezer rear panel. The sensor and thermal fuse are typically replaced as a single unit to prevent future failures.
Er HS — Humidity Sensor Error#
Common Causes
- Humidity sensor failure(common) — The sensor that monitors moisture levels in the fresh food compartment fails.
- Condensation on sensor(occasional) — Excess moisture causes erratic readings from the humidity sensor.
Professional Repair
Estimated Cost
$120-200
Repair Time
30-45 minutes
The humidity sensor is used for the LinearCooling system on newer LG models. It adjusts compressor speed to maintain optimal humidity.
Er IS — Ice Maker Sensor Error#
Common Causes
- Ice maker sensor malfunction(common) — The sensor that monitors ice tray temperature or ice level fails.
- Ice maker assembly failure(occasional) — The entire ice maker module has an internal fault affecting sensor readings.
Professional Repair
Estimated Cost
$180-300
Repair Time
45-60 minutes
On most LG models, the sensor is integrated into the ice maker assembly. Full replacement is often more cost-effective than individual sensor repair.
DIY Risk: Wrong Diagnosis = Bigger Bill
Replacing the wrong part on your Refrigerator wastes money and time. A wrong diagnosis often turns a $150 repair into a $600+ problem. Our free diagnostic eliminates the guesswork.
Er dH — Defrost Heater Error#
Common Causes
- Defrost heater burnout(common) — The glass tube or calrod-style defrost heater burns out, causing frost to accumulate on the evaporator and block airflow.
- Defrost relay failure(occasional) — The relay on the main board that powers the defrost heater fails.
Professional Repair
Estimated Cost
$180-280
Repair Time
45-60 minutes
The defrost heater wraps around the evaporator behind the freezer rear panel. If ignored, frost buildup leads to a warm freezer and warm fridge within days. In our Sacramento service calls, defrost heater is the most common LG refrigerator repair.
Er IT — Ice Maker Motor Error#
Common Causes
- Ice maker motor failure(common) — The ice maker ejector motor cannot turn to harvest ice from the tray.
- Mechanism jam(occasional) — Ice cubes fuse together in the tray, preventing the ejector from rotating.
Professional Repair
Estimated Cost
$180-300
Repair Time
45-60 minutes
The ice maker motor is integrated into the ice maker module. When the motor fails, the entire assembly is typically replaced.
Er gF — Flow Sensor Error#
Common Causes
- Water flow sensor failure(common) — The turbine flow sensor that measures water dispensed fails to send pulse signals.
- Low water pressure(occasional) — Water pressure below 20 PSI prevents the sensor from detecting adequate flow.
Professional Repair
Estimated Cost
$120-200
Repair Time
30-45 minutes
The flow sensor is in the water supply line at the rear of the refrigerator. Check water pressure before assuming sensor failure.
Repair vs Replace: The Math
Most Refrigerator issues are fixable at a fraction of replacement cost. Our free diagnostic tells you exactly what is wrong and gives you an honest quote — no obligation.
Er rT — Room Temperature Sensor Error#
Common Causes
- Ambient sensor failure(common) — The sensor that measures room temperature (used for energy optimization) fails.
- Sensor location issue(occasional) — The sensor is exposed to direct heat from a nearby oven or dishwasher.
Professional Repair
Estimated Cost
$120-200
Repair Time
30 minutes
The room temp sensor is typically near the main board. It does not directly affect cooling but impacts energy optimization algorithms.
Er SS — Pantry Sensor Error#
Common Causes
- Pantry drawer sensor failure(common) — The temperature sensor in the convertible pantry/drawer section fails.
Professional Repair
Estimated Cost
$120-200
Repair Time
30-45 minutes
Only affects models with a convertible drawer. The sensor is inside the drawer compartment.
Er CL — Door Not Closing Properly#
Common Causes
- Door gasket worn or dirty(common) — The magnetic door gasket has debris, food residue, or has lost elasticity, preventing a proper seal.
- Door hinge misalignment(occasional) — A sagging door prevents the gasket from meeting the frame evenly.
DIY Fix
- Inspect the door gasket for visible tears, gaps, or debris.
- Clean the gasket with warm soapy water and a soft cloth.
- Close the door and check for gaps by sliding a dollar bill around the perimeter. It should grip the bill.
- If the door sags, adjust the bottom hinge height by turning the adjusting bolt clockwise.
Professional Repair
Estimated Cost
$120-200
Repair Time
30-45 minutes
Gasket replacement on LG French Door models requires carefully stretching the new gasket into the door channel without distortion.
LG Refrigerator Broken? Same-Day Diagnostic Available
Our certified technicians serve the Bay Area and Sacramento. Free diagnostic visit — we identify the problem, quote the repair, and fix it on the spot in most cases. No hidden fees.
Licensed & Insured · 90-Day Warranty · Same-Day Service
Er Comp — Compressor Error#
Common Causes
- Linear compressor failure(common) — LG Linear Compressors are known for a specific failure mode where the internal piston mechanism wears, causing clicking/knocking sounds before complete failure.
- Inverter board failure(occasional) — The inverter board that controls compressor speed fails, preventing the compressor from starting.
Professional Repair
Estimated Cost
$400-800
Repair Time
120-180 minutes
LG Linear Compressor replacement requires recovering refrigerant, brazing, leak testing, and recharging. LG offers a 10-year limited warranty on the Linear Compressor (parts only). Based on our Bay Area repair data, LG compressor failure is most common between years 4-7 and is cost-effective to repair under warranty.
Er DI — Ice Dispenser Error#
Common Causes
- Ice chute jammed(common) — Ice cubes are stuck in the dispenser chute, blocking new ice from dispensing.
- Dispenser motor failure(occasional) — The auger motor that pushes ice to the chute fails.
DIY Fix
Warning
Do not use sharp metal objects that could damage the chute or ice bin.
- Open the freezer door and inspect the ice chute from inside.
- Use a wooden spoon to gently break apart any ice clumps in the chute.
- Remove the ice bin and break apart any fused ice cubes.
- Reinstall and test the dispenser.
Professional Repair
Estimated Cost
$150-250
Repair Time
30-45 minutes
If clearing the chute does not help, the auger motor may need replacement.
Er FO — Fan Obstruction Error#
Common Causes
- Frost obstruction(common) — Ice has formed around a fan (freezer or fridge) preventing normal rotation.
- Food item blocking fan(occasional) — Items placed too close to the fan vent opening in the fridge obstruct airflow.
DIY Fix
Warning
Move all perishables to coolers with ice packs.
- Check that no food items are blocking the air vents inside the fridge or freezer.
- If vents are clear, unplug the refrigerator with both doors open for 8-12 hours.
- Place towels at the base to catch melt water.
- Plug back in and verify fans are running.
Professional Repair
Estimated Cost
$180-280
Repair Time
45-60 minutes
If defrosting does not resolve the obstruction, the fan motor may need replacement. Recurring frost issues indicate a defrost system problem.
LG Repair Tools Required
DIY tool investment: $0+ just for basics. Our technician arrives with $15,000+ in professional tools — your diagnostic is free.
67 — Door Ajar#
Common Causes
- Door not fully closed(common) — A food container or shelf item is preventing the door from closing completely.
- Door switch issue(occasional) — The door switch does not detect the closed position.
DIY Fix
- Check that no items are preventing the door from closing flush.
- Close the door firmly and verify the alarm stops.
- If the alarm continues with the door clearly closed, the door switch may need replacement.
Professional Repair
Estimated Cost
$100-180
Repair Time
20-30 minutes
A failed door switch is a simple replacement but requires disassembly of the door or frame to access.
Er SH — Shelf Heater Error#
Common Causes
- Mullion heater failure(common) — The anti-condensation heater strip between the fridge and freezer doors fails, causing visible condensation on the frame.
- Wiring issue(occasional) — The heater wire harness is damaged or disconnected.
Professional Repair
Estimated Cost
$150-250
Repair Time
30-45 minutes
The mullion heater runs between the door compartments to prevent condensation. While not critical for cooling, persistent condensation can cause mold growth on the door gaskets.
How to Enter LG Refrigerator Diagnostic Mode#
- Ensure the refrigerator is plugged in and powered on.
- Press and hold the Refrigerator + Ice Plus buttons simultaneously for 3 seconds.
- The display enters test mode and shows sensor readings.
- Use the LG ThinQ app for Smart Diagnosis if the unit has Wi-Fi.
- To exit, unplug the unit or press the same combination again.
LG Smart Diagnosis (phone): call 1-800-243-0000, hold the Temp button, place phone speaker near the Smart Diagnosis label on the unit. The refrigerator sends an audio signal for remote diagnosis.
Licensed & insured technicians, a free in-home diagnostic, and a 90-day repair guarantee — with our no-fix, no-fee promise, you only pay if we fix it.
LG Refrigerator Repair Cost Guide#
| Repair | Parts | Labor | Total |
|---|---|---|---|
| Linear compressor replacement | $250-400 | $200-350 | $450-750 |
| Evaporator fan motor replacement | $40-80 | $120-180 | $160-260 |
| Main control board replacement | $150-250 | $100-150 | $250-400 |
| Ice maker assembly replacement | $80-150 | $100-150 | $180-300 |
| Defrost heater/thermostat replacement | $30-60 | $120-160 | $150-220 |
| Door gasket replacement | $50-90 | $80-120 | $130-210 |
| Condenser fan motor replacement | $35-60 | $100-140 | $135-200 |
Frequently Asked Questions#
What does LG refrigerator Er FF error mean?
Er FF means the freezer evaporator fan is not working. The most common cause is ice buildup blocking the fan. Unplug the refrigerator and leave the freezer door open for 8-12 hours to thaw. If the fan does not restart after thawing, the motor needs replacement ($160-260 total). In our Sacramento service calls, manual defrost resolves Er FF about 60% of the time.
How do I use LG Smart Diagnosis on my refrigerator?
There are two methods. App method: open the LG ThinQ app, select your refrigerator, tap Smart Diagnosis. Phone method: call 1-800-243-0000, when instructed hold the Temp button while placing your phone speaker against the Smart Diagnosis label on the unit. The refrigerator sends an audio signal that LG decodes for diagnosis.
Why is my LG refrigerator clicking and not cooling?
Clicking sounds followed by no cooling typically indicate a failing LG Linear Compressor (Er Comp). The internal piston mechanism wears out, causing the clicking sound as it tries and fails to start. LG offers a 10-year limited warranty on the Linear Compressor (parts only). Contact LG to check your warranty status before paying for repair.
How often should I clean LG refrigerator condenser coils?
Clean condenser coils every 6-12 months, or every 3 months if you have pets. Dirty coils are the leading cause of Er CF errors and reduce energy efficiency by up to 25%. Remove the bottom front grille and vacuum the coils and fan area. Based on our Bay Area service data, regular coil cleaning prevents about 30% of compressor-related service calls.
Is the LG Linear Compressor reliable?
LG Linear Compressors have had documented reliability issues, particularly in units manufactured between 2014-2019. LG settled a class action lawsuit and extended the compressor warranty to 10 years. If your compressor fails within 10 years of purchase, parts are covered. However, labor is typically not included after the first year.
What does LG refrigerator Er CO mean?
Er CO is a communication error between the main control board and other components. This is a serious error that usually requires board replacement ($250-400). Try unplugging for 10 minutes first. On French Door models, check the wire harness through the upper door hinge, which is a known failure point.
Why is my LG refrigerator making a humming noise?
A normal LG refrigerator hum comes from the compressor running. If the hum is louder than usual, check that the unit is level and not touching a wall. A buzzing from the back may indicate a failing condenser fan (Er CF). Rattling could mean the drain pan under the unit is loose. Clicking before humming stops is a compressor start failure (Er Comp).
How long do LG refrigerators typically last?
Based on our repair data in the Sacramento and Bay Area regions, LG refrigerators average 10-15 years. The most common failure points are the Linear Compressor (4-7 years on affected models), ice maker (3-6 years), and defrost system (5-8 years). Regular maintenance extends lifespan significantly.
Can I fix an LG refrigerator ice maker myself?
Most ice maker issues require professional repair. However, you can troubleshoot: check that the ice maker is turned on, the water supply line is connected and valve open, and there is no ice jam in the chute. If the water line is frozen, unplug for 8 hours to thaw. If the ice maker motor hums but does not eject ice (Er IT), the assembly needs replacement ($180-300).
What does the LG refrigerator warranty cover?
LG provides a 1-year full parts and labor warranty, a 5-year parts warranty on the sealed system (compressor, evaporator, condenser, drier, connecting tubing), and a 10-year limited warranty on the Linear Compressor motor (parts only, labor not included). Some retailers offer extended coverage. Keep your purchase receipt for all warranty claims.
DIY Risk: Wrong Diagnosis = Bigger Bill
Replacing the wrong part on your Refrigerator wastes money and time. A wrong diagnosis often turns a $150 repair into a $600+ problem. Our free diagnostic eliminates the guesswork.
Lead Appliance Repair Technician · 12 years experience
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
