LG Appliance Error Codes
Washing Machine
Front-load, top-load, and combo washer fault codes for draining, filling, balancing, door lock, motor, and water-level systems.
OE /
E03 /
E21
E03 /
E21
Drain Error
Washer cannot drain the used wash water from the tub
What This Means
LG uses OE, E03, or E21 when the washer is unable to drain water during the cycle. LG links this most often to a kinked drain hose or a clogged drain pump filter.
Common Causes
- Kinked or clogged drain hose
- Clogged drain pump filter
- Lint, coins, or debris blocking the pump path
- Drain pump beginning to fail
What You Can Try
Check behind the washer for a kinked hose, then clean the drain pump filter and run Spin/Drain again. If the same code returns after the hose and filter are clear, the drain pump or wiring likely needs service.
IE /
E02 /
E10
E02 /
E10
Water Inlet Error
Tub did not fill to the required level in the expected time
What This Means
IE, E02, or E10 means the washer did not receive enough incoming water within the allowed fill period. LG points to closed faucets, a bent hose, frozen supply hoses, or an inlet-valve issue.
Common Causes
- Water faucet turned off
- Bent, pressed, or frozen supply hose
- Blocked inlet screen or low water pressure
- Failing water inlet valve
What You Can Try
Open both supply valves fully, inspect the fill hoses, and clean the inlet screens if needed. In cold weather, thaw any frozen supply line or hose. If the tub still will not fill normally, service is likely required.
UE
Unbalanced Load
Laundry is not distributed evenly enough for spin
What This Means
UE appears when the load is piled to one side or the drum cannot balance the laundry weight correctly. LG notes it can happen with loads that are too large, too small, or badly distributed.
Common Causes
- Single heavy item washing alone
- Bulky items tangled on one side
- Load too small to balance properly
- Washer not level on the floor
What You Can Try
Pause the cycle, redistribute the laundry, and try spin again. If UE appears often with normal loads, check that the washer is level and all feet are firmly touching the floor.
LE
Motor / Tub Rotation Error
Motor cannot rotate the drum normally
What This Means
LG says LE is displayed when the tub fails to spin because the motor cannot operate properly. Overloading and foreign objects trapped in the tub are common triggers.
Common Causes
- Washer overloaded
- Coin or foreign object stuck in the tub area
- Motor strain from repeated heavy cycles
- Motor or hall-sensor related fault
What You Can Try
Unplug the washer for 5 minutes and retry with a lighter load. Check for coins or other objects around the drum or wash plate area. If LE keeps returning on a small load, professional diagnosis is needed.
dE /
dE1 / E01
dE1 / E01
Door Not Closed
Door is not shut securely enough for the cycle to start
What This Means
LG states that dE, dE1, or E01 means the door is not closed properly. Laundry caught between the door and the rubber gasket is a common cause.
Common Causes
- Door not closed firmly
- Laundry trapped in the door opening
- Door gasket preventing full closure
- Door switch or latch issue
What You Can Try
Open the door, clear any trapped laundry, and close the door firmly. If needed, power the washer off, unplug it, hold Start/Pause for 5 seconds, then restore power and retry.
dE2 /
E30
E30
Door Lock Error
Door is closed but the washer cannot confirm it is locked
What This Means
LG says dE2 or E30 means the door is closed but not locked. This can happen when the latch is bent, something is caught at the gasket, or the door-lock mechanism does not engage.
Common Causes
- Door latch not engaging
- Items caught between door and gasket
- Bent or damaged latch
- Faulty door-lock assembly
What You Can Try
Check the door area carefully, reopen and close it, then reset the washer. If the code remains after a reset, the door-lock system likely needs service.
FE /
E04 /
E12
E04 /
E12
Overfill Error
Too much water has entered the drum and drain protection has started
What This Means
LG describes FE, E04, or E12 as a water overfilling problem. During this condition the drain pump is activated to reduce the leak risk.
Common Causes
- Extra water entering through the dispenser path
- Stuck or leaking inlet valve
- Water-level sensing issue
- Control fault allowing overfill
What You Can Try
Turn the washer off, unplug it, and restart after about 60 seconds. If it immediately tries to overfill again or the code returns, shut the water off and arrange service before using it again.
PE /
E33
E33
Water Level Sensor Fault
Pressure / water-level sensor is not reading correctly
What This Means
LG says PE or E33 indicates the water-level sensor is malfunctioning. Without a correct water-level signal, the washer cannot safely control fill or drain behavior.
Common Causes
- Faulty pressure sensor
- Loose sensor connection
- Control board reading issue
- Air hose to sensor compromised
What You Can Try
Unplug the washer for 10 seconds and restart the cycle once. If the code comes back, this is usually not a user-fixable issue and service is recommended.
tE
Thermistor / Heating Error
Washer detected a heating-related fault, usually tied to the thermistor
What This Means
LG says tE indicates a heating error, usually caused by a faulty thermistor. The washer may stop before finishing the cycle because it cannot trust the temperature feedback.
Common Causes
- Faulty thermistor
- Temperature reading out of range
- Wiring issue to heater or sensor
- Heater circuit fault
What You Can Try
Unplug the washer for 10 seconds, restore power, and allow it to drain before retrying. If tE returns, close the water taps and disconnect power until the unit is serviced.
CE
Motor Over-Current
Motor circuit has seen an over-current condition
What This Means
LG states CE means there has been an over-current in the motor circuit. LG ties this to short circuits, loose connections, ground faults, or power surges.
Common Causes
- Motor short or overload event
- Loose electrical connection
- Ground fault
- Power surge damage
What You Can Try
Unplug the washer for 10 seconds and try one restart. If CE returns, turn off the water supply and leave the washer unplugged until it is diagnosed.
Dryer
Electric, gas, condenser, and heat-pump dryer codes for venting, sensors, power supply, gas supply, drain, and filter conditions.
d80 /
d90 /
d95
d90 /
d95
Exhaust Restriction
Dryer senses a severely restricted vent path to the outdoors
What This Means
LG uses d80, d90, and d95 to show that airflow is restricted somewhere between the dryer and the outside exhaust exit. The higher the number, the more severe the restriction.
Common Causes
- Lint buildup in the duct
- Crushed or kinked exhaust hose
- Blocked exterior flapper or screen
- Long or poorly routed vent system
What You Can Try
Clean the lint filter, inspect the hose behind the dryer, and make sure the outside vent opens freely. If the duct system inside the walls is restricted, professional vent cleaning is usually the best next step.
tE1–
tE6
tE6
Thermistor Error
Dryer detected a problem with its temperature sensor circuit
What This Means
LG says tE1 through tE6 indicate that the dryer detected a thermistor problem. The machine cannot control drying temperatures correctly when this sensor is out of range.
Common Causes
- Faulty thermistor
- Loose sensor connection
- Wiring harness issue
- Control board sensor-reading problem
What You Can Try
Unplug the dryer, hold Start/Pause for 5 seconds while power is off, then restore power and test again. If the error repeats, service is needed.
nP
No Heater Current
Dryer is not detecting current at the heating circuit
What This Means
LG states nP means no current is being detected at the heater. In many cases LG points first to a household wiring or outlet issue rather than an internal dryer failure.
Common Causes
- Incorrect or weak supply voltage
- Loose power cord connection
- Breaker issue
- Heater circuit fault
What You Can Try
Confirm the dryer is plugged into the correct grounded 240V outlet and reset the circuit breaker. If nP remains, the outlet and supply should be checked by a licensed electrician before appliance service.
PS
Improper Voltage
Power cord wiring or supply voltage is incorrect
What This Means
LG says PS indicates improper voltage with the power cord, often tied to cord-installation issues such as reversed wire connections at the terminal block.
Common Causes
- Incorrect power cord installation
- Reversed red and white wire connections
- Poor grounding
- Improper outlet voltage
What You Can Try
Do not keep running the dryer with a PS error. Check the cord installation and reset the breaker once. If the code remains, have the power connection verified properly.
dE /
dE4
dE4
Door Error
Dryer door is not fully closed or aligned correctly
What This Means
LG says dE or dE4 means the door is not completely closed. A misaligned door, clothing caught at the opening, or even a filter not seated correctly can trigger it.
Common Causes
- Door not closed fully
- Clothing trapped at the door opening
- Lint filter not seated properly
- Door misalignment or latch issue
What You Can Try
Open the door, confirm the lint filter is pushed all the way in, remove anything caught at the opening, then close the door firmly and retry.
FO /
INSERT
FILTER
INSERT
FILTER
Lint Filter Not Inserted Correctly
Dryer sensor does not detect the lint filter in its proper position
What This Means
LG says FO or a flashing INSERT FILTER message means the lint filter should be checked and reinserted properly. The dryer will stop if the filter is not seated as expected.
Common Causes
- Lint filter not fully inserted
- Filter installed crooked
- Housing obstruction preventing seating
- Filter sensor issue
What You Can Try
Remove the lint filter and reinsert it carefully into the housing. If FO returns with the filter correctly installed, the sensor or filter housing may need service.
HS
Humidity Sensor Error
Dryer is not reading the moisture sensor correctly
What This Means
LG says HS means the dryer has detected a humidity-sensor error. The dryer may then run for a long time and seem like it is not drying properly.
Common Causes
- Dirty moisture sensor bars
- Residue from dryer sheets or softener
- Sensor wiring issue
- Failed humidity sensor
What You Can Try
Clean the metal sensor bars inside the dryer below the lint filter and let them dry completely. If HS returns after cleaning, service is recommended.
PF
Power Failure
Dryer lost power during operation
What This Means
PF usually appears after a power interruption. LG recommends a basic reset before assuming there is a parts failure.
Common Causes
- Recent utility outage
- Breaker interruption
- Loose power connection
- Momentary supply drop
What You Can Try
Unplug the dryer or switch the breaker off, hold Start/Pause for 5 seconds, then restore power and try another cycle.
gAS
No Gas Supplied
Gas dryer is not receiving gas to heat
What This Means
LG says gAS means the dryer is not receiving gas. The dryer may tumble but produce no heat until gas supply is restored.
Common Causes
- Gas supply valve turned off
- Kinked gas line
- No gas supply to the appliance
- Gas-valve or ignition issue
What You Can Try
Verify the gas shutoff valve is on and the line is not kinked. If gas supply to the home is normal and gAS remains, the dryer needs service.
drn /
OE
OE
Drain Error
Condensing dryer cannot drain the collected water correctly
What This Means
LG uses drn or OE on certain dryers to indicate a drainage problem. LG points to a full water container, a kinked hose, or air trapped in the drain pump system.
Common Causes
- Water container full
- Drain hose kinked or pressed
- Drain hose extended incorrectly
- Drain pump airlock or fault
What You Can Try
Empty the water container, inspect the drain hose for kinks, and restart the dryer. If the same code returns, the drain path or pump may need service.
Refrigerator
French-door, side-by-side, and bottom-freezer refrigerator codes for defrost, fan, communication, sensor, door, and sealed-system problems.
dH
Defrost Failure
Unit spent too long in defrost without reaching the required temperature
What This Means
LG says dH means the refrigerator spent more than 1 hour trying to defrost and the evaporator did not reach the preset temperature in time.
Common Causes
- Heavy ice buildup
- Defrost heater issue
- Defrost sensor problem
- Main control fault affecting defrost
What You Can Try
Unplug the refrigerator for 2 minutes and restore power once. If the code returns quickly, internal defrost components or frost buildup usually need service attention.
dS /
F dS /
r dS
F dS /
r dS
Defrost Sensor Fault
Defrost sensor is shorted or disconnected
What This Means
LG states dS means a short or disconnection of the defrosting sensor. F dS points to the freezer defrost sensor and r dS points to the refrigerator defrost sensor.
Common Causes
- Failed defrost sensor
- Loose connector
- Damaged wiring in the evaporator area
- Moisture or frost damage at the harness
What You Can Try
There is no practical customer-level repair for this code. Service is recommended because the unit cannot manage defrost reliably without the sensor signal.
rF /
E rF
E rF
Refrigerator Fan Error
Refrigerator compartment fan is not operating normally
What This Means
LG says rF or E rF means the refrigerator compartment fan motor is abnormal. LG also notes that frost buildup can lock the fan and trigger this code.
Common Causes
- Fan motor failure
- Frost or ice blocking the fan
- Fan wiring issue
- Control-board communication issue
What You Can Try
Unplug the unit or trip the dedicated breaker for about 5 minutes, then restart it. If the same code returns, the fan system needs diagnosis.
CO
Control / Display Communication Error
Main control board and display are not communicating correctly
What This Means
LG states CO indicates a communication error between the refrigerator control board and the display.
Common Causes
- Loose display harness
- Main board issue
- Display board problem
- Power-event communication fault
What You Can Try
A brief power reset can be tried once, but LG does not list customer troubleshooting steps for this code. If CO remains, service is required.
67
Door Gap / Closure Problem
Door is not closing correctly or something is preventing a full seal
What This Means
LG says 67 means there is a gap in the door or an object inside the refrigerator is restricting the door from closing properly.
Common Causes
- Food bin or shelf item blocking the door
- Door gasket not sealing
- Door out of alignment
- Object trapped at the closing edge
What You Can Try
Rearrange items that may be pushing the door open, inspect the gasket, and close the door firmly. If the code remains with a clear opening, hinge or gasket service may be needed.
CH E /
E CH
E CH
High-Side Refrigerant Leak
Sealed system likely has a leak on the high side / condenser side
What This Means
LG says CH E or E CH strongly points to a high-side refrigerant leak, with the condenser side being the most likely area.
Common Causes
- Sealed-system refrigerant leak
- Condenser-side leak
- Related pressure abnormality
- Cooling performance breakdown
What You Can Try
Do not keep power-cycling the appliance repeatedly. LG does not list a customer repair path here; sealed-system service is required.
CL E /
E CL
E CL
Low-Side Refrigerant Leak
Sealed system likely has a leak on the evaporator / low side
What This Means
LG says CL E or E CL strongly points to a low-side refrigerant leak, most often associated with the evaporator side of the system.
Common Causes
- Evaporator-side refrigerant leak
- Sealed-system pressure problem
- Loss of cooling capacity
- Internal tubing leak
What You Can Try
There are no customer troubleshooting steps listed by LG for this code. Professional sealed-system repair is required.
C1
Dispenser / Display Communication Fault
LCD display and dispenser are not communicating correctly
What This Means
LG says C1 indicates a communication error between the LCD display and the dispenser.
Common Causes
- Dispenser harness issue
- Display board issue
- Main board communication fault
- Connector corrosion or looseness
What You Can Try
A power reset can be attempted once, but LG does not provide customer troubleshooting steps for a persistent C1 code.
Sb
Sabbath Mode Active
Not a fault code — the refrigerator is in Sabbath mode
What This Means
LG says Sb is typically Sabbath mode, not a malfunction. On compatible models it can also look like S6, 5b, or 56 depending on the display.
Common Causes
- Sabbath mode enabled intentionally
- Buttons pressed and held accidentally
- User unfamiliar with mode display
What You Can Try
Touch the display and press and hold the Freezer and Wi-Fi buttons for about 3 seconds to exit Sabbath mode on supported models.
Dishwasher
LG dishwasher codes for fill, drain, leak, motor, heater, thermistor, detergent, and spray-arm / vario-motor issues.
IE
Inlet / Fill Error
Dishwasher did not reach the proper water level after filling
What This Means
LG says IE means the water level did not get high enough after 10 minutes of filling.
Common Causes
- Water supply valve turned off
- Kinked or bent water line
- Low water pressure
- Drain hose outlet installed too low and causing siphoning
What You Can Try
Check that the water supply is on, the line is not kinked, and household pressure is adequate. Make sure the drain hose end is installed high enough so water is not siphoning out during fill.
OE
Drain Error
Dishwasher is not draining correctly
What This Means
LG ties OE to a draining problem. The drain hose, disposal connection, and overall drain path are the first places to inspect.
Common Causes
- Kinked or blocked drain hose
- Garbage disposal knockout plug not removed
- Drain path blockage
- Drain pump issue
What You Can Try
Inspect the drain hose for kinks or blockage and check the garbage-disposal connection if recently installed. Clear any obstruction and retry the cycle.
AE /
E1
E1
Leak / Float Switch Error
Leak has activated the safety float switch in the base
What This Means
LG says AE or E1 means there is a leak inside the dishwasher and the float switch has been activated.
Common Causes
- Unit not level
- Door gasket dirty or damaged
- Spray arm blocked or damaged
- Too much detergent or wrong detergent causing oversuds
What You Can Try
Check leveling, clean the door gasket, inspect the spray arms, and make sure only dishwasher detergent is being used. Dry any water in the base pan before retrying.
LE /
CE
CE
Motor Error
Motor or motor-to-board wiring problem detected
What This Means
LG says LE or CE on a dishwasher points to a motor error or a wiring-harness issue between the motor and control board.
Common Causes
- Wash motor problem
- Wiring harness issue
- Control board not driving motor correctly
- Temporary electronic fault
What You Can Try
Turn the dishwasher off, shut the breaker off for about 10 seconds, then restore power and run a new cycle. If the code persists, service is needed.
FE
Fill Error / Too Much Water
Dishwasher has detected excessive water in the tub
What This Means
LG says FE means the dishwasher experienced a fill error and detected too much water in the unit. The drain pump may run automatically.
Common Causes
- Overfill condition
- Inlet valve not closing correctly
- Flow-switch or level-detection issue
- Control fault
What You Can Try
Power the dishwasher off and cycle the breaker once. If FE returns, stop using the unit until it is inspected.
HE
Heater Error
Dishwasher could not heat the water properly or overheated it
What This Means
LG says HE means the dishwasher either could not heat the water or the water overheated above 149°F.
Common Causes
- Heater circuit fault
- Thermistor/control issue causing overheating
- Wiring problem to heater
- Control board error
What You Can Try
Turn the unit off, switch the breaker off for 10 seconds, then restart a new cycle. If HE comes back, service is required.
tE
Thermal / Thermistor Error
Water temperature is too high or the thermistor reading is faulty
What This Means
LG says tE is a thermal error. It can happen if water temperature exceeds 194°F or if there is a thermistor problem.
Common Causes
- Thermistor failure
- Excessively hot incoming water
- Control-board temperature reading issue
- Heater control problem
What You Can Try
If the dishwasher keeps showing tE after a restart, service is recommended because the water-temperature sensing system is not operating correctly.
bE
Detergent / Leveling Error
Wrong detergent or poor leveling is causing wash problems
What This Means
LG says bE can indicate improper detergent use or a leveling issue.
Common Causes
- Hand-washing liquid used instead of dishwasher detergent
- Too much detergent creating excess suds
- Dishwasher not level
- Water overflow caused by sudsing
What You Can Try
Use only automatic dishwasher detergent and confirm the dishwasher is level. If the code persists with correct detergent and proper leveling, further service may be needed.
nE
Vario Motor Error
Spray-arm vario motor may not be operating correctly
What This Means
LG says nE indicates a possible problem with the vario motor that controls the dishwasher spray arms.
Common Causes
- Vario motor fault
- Spray-arm positioning issue
- Wiring problem
- Control output issue
What You Can Try
A basic power reset can be tried, but a persistent nE generally points to a service issue.
Freezer & Ice Maker
Freezer fan, defrost, ice maker sensor, ice-maker assembly, flow sensor, and diagnostic display codes that LG folds into refrigerator support.
EID
Freezer Ice Maker Sensor Failure
Ice maker temperature / sensing circuit in freezer has failed
What This Means
LG says EID indicates a freezer-compartment ice maker sensor failure.
Common Causes
- Ice maker sensor failure
- Wiring harness issue
- Moisture damage at sensor connection
- Internal ice maker assembly fault
What You Can Try
LG does not list customer troubleshooting for EID. Ice-maker sensor service is required.
EIU
Freezer Ice Maker Assembly Failure
Main freezer ice maker assembly is not operating correctly
What This Means
LG says EIU indicates a freezer-compartment ice maker assembly failure.
Common Causes
- Ice maker assembly failure
- Internal motor or sensor fault
- Ice maker wiring issue
- Board-to-ice-maker communication issue
What You Can Try
This is generally a service-only repair. LG does not list a customer reset that resolves a persistent EIU code.
IS /
1S
1S
Ice Maker Fan / Sensor Fault
Ice maker fan motor problem or ice maker sensor disconnection
What This Means
LG says IS or 1S means there is a problem with the ice maker fan motor or a disconnection of the ice maker sensor.
Common Causes
- Ice maker fan motor fault
- Disconnected or failed sensor
- Frost affecting the fan area
- Harness issue in the ice-maker zone
What You Can Try
LG does not provide customer troubleshooting for a persistent IS/1S code. Service is recommended.
IF /
F1
F1
Ice Maker Fan Error
Ice maker fan is not running normally, often because of frost buildup
What This Means
LG says IF or F1 means the refrigerator has detected a problem with the ice maker fan. LG also notes this can happen when frost or ice builds up around the fan.
Common Causes
- Ice maker fan motor fault
- Frost buildup around the fan
- Airflow blockage
- Fan wiring or board issue
What You Can Try
A brief power reset can be tried once. If the same code returns, the ice-maker fan area usually needs diagnosis and likely defrost / repair.
iT
Ice Maker Defect
LG reports a defect in the ice maker itself
What This Means
LG says iT means there is a defect in the ice maker.
Common Causes
- Internal ice maker mechanism failure
- Harvest motor problem
- Ice maker control fault
- Sensor-related internal defect
What You Can Try
LG does not list a customer repair path for iT. A faulty ice maker typically needs professional replacement or repair.
FF /
E FF
E FF
Freezer Fan Error
Freezer fan motor is not operating normally
What This Means
LG states FF or E FF occurs when the freezer fan motor does not operate normally. LG also notes it can happen if ice locks the fan motor.
Common Causes
- Freezer fan motor failure
- Ice buildup around the fan
- Wiring issue
- Control-board fan drive problem
What You Can Try
Unplug the unit and restore power after about 5 minutes to see if the fan resets. If frost is blocking the fan, longer defrosting or service may be required.
gF
Water Flow Sensor Error
Flow sensor is not reading incoming water correctly
What This Means
LG says gF indicates a malfunction in the appliance’s water flow sensor. LG points to a closed water tap, a kinked hose, or incorrect water pressure.
Common Causes
- Water tap closed
- Kinked water hose
- Low or incorrect water pressure
- Faulty flow sensor
What You Can Try
Confirm the refrigerator water supply valve is on, inspect the water line for kinks, and verify household pressure is normal. If the code stays on, the flow sensor may need service.
88
Diagnostic Display, Not a Fault
Diagnostic code display can show 88 even when the unit is functioning normally
What This Means
LG says 88 indicates the unit is functioning properly when displayed through the diagnostic key sequence.
Common Causes
- Diagnostic mode triggered
- User held ICE PLUS and FREEZER buttons
- Service check performed
What You Can Try
This is not a repair code by itself. If cooling and ice production are normal, no action is required.
Range & Stove
LG range and stove fault codes for keypad, oven thermistor, heating performance, communication, steam, and self-clean fan issues.
F3
Touch Pad Sensor Key Error
Control keypad is detecting an invalid or stuck key input
What This Means
LG says F3 indicates a touch-pad sensor key error on the range control.
Common Causes
- Stuck keypad input
- Moisture on the control
- Touch panel fault
- Control-board error
What You Can Try
Turn the circuit breaker off for about 30 seconds and restore power. If F3 returns, the control assembly usually needs service.
F4
Lower Oven Thermistor Error
Lower oven temperature sensor is out of range
What This Means
LG says F4 indicates a lower-oven thermistor error. The oven cannot regulate temperature correctly without a valid sensor reading.
Common Causes
- Failed oven thermistor
- Sensor wiring problem
- Connector issue at the control
- Control-board misread
What You Can Try
Press Clear/Off and retry the function. If the code reappears, reset the breaker once. Persistent F4 usually requires sensor or control diagnosis.
F9
Upper Oven Not Heating Properly
Upper oven is not reaching or maintaining expected heat
What This Means
LG says F9 indicates the upper oven is not heating properly.
Common Causes
- Heating element issue
- Relay / control issue
- Temperature-sensor problem
- Power-supply fault to upper oven
What You Can Try
Clear the error and try the original function once more. If F9 returns, service is recommended because the oven is not heating as expected.
F11
Communication Error
Range electronics are not communicating correctly
What This Means
LG says F11 indicates a communication error.
Common Causes
- Internal board communication problem
- Harness issue between boards
- Momentary control glitch
- Board failure
What You Can Try
Press Clear/Off and, if needed, reset the breaker for 30 seconds. If F11 returns, service is usually required.
F25
Steam Sensor Failure
Steam-sensing hardware is not reporting correctly
What This Means
LG says F25 indicates a steam sensor failure.
Common Causes
- Failed steam sensor
- Sensor wiring issue
- Control-board read failure
- Moisture-related component damage
What You Can Try
A power reset can be tried once, but a persistent F25 is a service issue.
F27
Cooling Fan Stalled During Self Clean
Self-clean cooling fan is locked or stalled
What This Means
LG says F27 indicates the cooling fan stalled or locked during self-clean.
Common Causes
- Cooling fan obstruction
- Fan motor failure
- Self-clean heat stress on the fan system
- Control not sensing fan rotation
What You Can Try
Turn the breaker off for about 30 seconds and restore power. If F27 returns, avoid more self-clean attempts until the fan system is repaired.
Cooktop
Induction and electric cooktop codes and indicators for burner temperature sensors, inverter communication, voltage, fans, griddle sensors, hot surface, lock mode, and cookware detection.
F33 /
F34
F34
Induction Burner Temperature Sensor Error
One of the induction burner temperature sensors is reporting a fault
What This Means
LG says F33 and F34 indicate induction burner temperature sensor errors.
Common Causes
- Failed burner temperature sensor
- Sensor wiring issue
- Overheat damage near the element
- Control-board sensor read fault
What You Can Try
Switch the breaker off for about 30 seconds and try the cooktop again. If the code returns, service is needed.
F36
Transistor Error
Power electronics have detected a transistor fault
What This Means
LG says F36 indicates a transistor error in the induction electronics.
Common Causes
- Power transistor failure
- Overheat event in the inverter section
- Voltage-related damage
- Main power board fault
What You Can Try
Do not continue repeated use with F36 present. A one-time breaker reset can be tried, but persistent F36 needs service.
F38
Main Board / Inverter Communication Error
Cooktop main board and inverter are not communicating correctly
What This Means
LG says F38 indicates a communication error between the main board and inverter.
Common Causes
- Loose harness between boards
- Main board failure
- Inverter fault
- Power-event communication interruption
What You Can Try
Reset the breaker once. If the code reappears, board-level diagnosis is required.
F42
Voltage Error
Cooktop is detecting improper supply voltage
What This Means
LG says F42 indicates a voltage error.
Common Causes
- Incorrect incoming voltage
- Supply fluctuation
- Wiring issue at installation
- Internal voltage-sensing fault
What You Can Try
Do not keep using the cooktop with a voltage error showing. Reset once only, then have the supply and installation checked if F42 returns.
F45 /
F46
F46
Fan Error
Cooling fan system is not operating correctly
What This Means
LG says F45 and F46 indicate fan errors.
Common Causes
- Cooling fan motor problem
- Fan obstruction
- Wiring fault
- Control board not sensing fan operation
What You Can Try
After a breaker reset, a persistent F45 or F46 usually requires service because the electronics cooling system is involved.
F51
Griddle Sensor Error
Built-in griddle temperature sensor is not reading correctly
What This Means
LG says F51 indicates a griddle sensor error.
Common Causes
- Failed griddle sensor
- Sensor harness issue
- Control board read fault
- Heat damage at the sensor
What You Can Try
A breaker reset can be attempted once. If the error remains, service is required.
PULSING
BAR
BAR
Cookware Not Detected
Induction zone does not detect compatible cookware
What This Means
LG’s induction range guidance says a slowly pulsating LED bar appears when the cookware is not compatible with induction or is not being detected correctly.
Common Causes
- Non-induction cookware
- Pan too small for the zone
- Pan not centered
- Cookware base warped or unsuitable
What You Can Try
Test the cookware with a magnet and use induction-compatible cookware centered on the zone. If a good pan still is not detected, the zone may need service.
HS
Hot Surface Indicator
Not an error — the cooktop surface is still hot
What This Means
LG notes that HS after the element is turned off is normal and means the cooktop surface is still hot.
Common Causes
- Recently used burner
- Residual heat in ceramic surface
- Normal hot-surface warning behavior
What You Can Try
Let the surface cool fully before touching or cleaning it. No repair is needed for HS by itself.
LOCK
Child / Control Lock Active
Controls are locked, not failed
What This Means
LG’s range guidance says if the lock indicator is lit, the lock function is set and the controls will not respond normally.
Common Causes
- Child lock enabled
- Control lock turned on accidentally
- User mistaking a lock state for a fault
What You Can Try
Press and hold the Lock or Child Lock button for about 3 seconds to cancel the lock on supported models.
Oven / Microwave
LG microwave and built-in oven indicators for control boards, thermistors, humidity sensors, damper switches, inverter communication, voltage, heating, door latch, lock mode, and clock-format messages.
E10
Internal Control Board Short
Microwave control board has detected an internal short
What This Means
LG says E10 indicates an internal short was detected in the control board.
Common Causes
- Internal control board fault
- Shorted board component
- Power-event damage
- Moisture or contamination on electronics
What You Can Try
Unplug the microwave for about 1 minute, plug it back in, and retry the control panel. If E10 returns, service is required.
F1
Main Board Fault
Microwave main board has a fault
What This Means
LG says F1 indicates a problem with the mainboard.
Common Causes
- Main control board failure
- Power surge damage
- Internal board communication failure
- Component-level board fault
What You Can Try
LG treats this as a service code. A quick power reset can be tried once, but a persistent F1 needs repair.
F2
Thermistor Out of Range
Temperature sensor is reading out of the expected range
What This Means
LG says F2 indicates a thermistor problem causing the temperature in the unit to be out of range.
Common Causes
- Failed thermistor
- Sensor wiring issue
- Temperature feedback problem
- Control board read fault
What You Can Try
This code generally requires service because the microwave cannot verify safe temperatures.
F3
Control Panel Fault
Microwave control panel is not operating correctly
What This Means
LG says F3 indicates a problem with the control panel.
Common Causes
- Touch panel fault
- Control interface failure
- Stuck key matrix issue
- Board-panel communication fault
What You Can Try
A persistent F3 is usually a service issue rather than a user-fixable one.
F4
Humidity Sensor Error
Humidity-sensing circuit is not reading correctly
What This Means
LG says F4 indicates a humidity sensor error.
Common Causes
- Failed humidity sensor
- Sensor wiring issue
- Steam / moisture contamination
- Control-board sensor fault
What You Can Try
LG lists this as a service code. Continued use of humidity-sensor cooking should be avoided until it is repaired.
F5
Damper Switch Error
Damper switch is not reporting the expected position
What This Means
LG says F5 indicates a damper switch error.
Common Causes
- Damper switch failure
- Damper not moving correctly
- Mechanical obstruction
- Wiring or control fault
What You Can Try
This code generally needs service because internal airflow control is involved.
F11
Inverter Communication Error
Microwave inverter and control are not communicating correctly
What This Means
LG says F11 indicates an inverter communication error.
Common Causes
- Inverter board problem
- Loose harness connection
- Main board communication failure
- Power-electronics fault
What You Can Try
A quick power reset can be tried once, but persistent F11 generally requires repair.
F13–
F15
F15
Voltage Error
Microwave has detected an internal voltage-related fault
What This Means
LG says F13 indicates a voltage error, and these grouped codes are treated as service-level electrical faults.
Common Causes
- Voltage-supply anomaly
- Power board issue
- Internal electrical fault
- Component-level failure
What You Can Try
Disconnect power once and retry. If the code returns, the microwave should be serviced rather than repeatedly reset.
F16 /
F19
F19
Heating Issue
Microwave detected a heating-related fault
What This Means
LG says F16 and F19 indicate a heating issue was detected.
Common Causes
- Heating circuit fault
- Inverter / magnetron-related issue
- Sensor feedback problem
- Board-level heating control fault
What You Can Try
Do not keep retrying cook cycles with these codes showing. Service is recommended.
F17
Temperature Sensor Error
Microwave temperature sensor is not reading correctly
What This Means
LG says F17 indicates a problem with the temperature sensor.
Common Causes
- Failed temperature sensor
- Sensor harness issue
- Sensor reading out of range
- Board-sensor communication fault
What You Can Try
A persistent F17 is a service issue.
LOC
Lock Function Active
Not an error — microwave controls are locked
What This Means
LG says LOC indicates the lock function is turned on to prevent unwanted microwave operation.
Common Causes
- Control lock enabled
- User activated lock accidentally
- Normal safety feature
What You Can Try
Press and hold Stop/Clear until LOC disappears from the display.
DOOR
Door / Latch Error
Door is not closed or latched correctly
What This Means
LG says DOOR means the microwave door is not closed or the door latch is not engaged.
Common Causes
- Door not shut firmly
- Packing material or debris in the latch area
- Cooking rack out of position
- Door latch issue
What You Can Try
Remove any obstruction, make sure racks are positioned correctly, and close the door firmly. If DOOR stays on, the latch system may need service.
12H /
24H
24H
Clock Format Message
Not an error — the microwave is asking for 12-hour or 24-hour clock mode
What This Means
LG says 12H and 24H are not faults. They indicate the clock format needs to be set.
Common Causes
- Recent power interruption
- Initial setup after installation
- Clock reset
What You Can Try
Open the door, use the plus/minus controls to choose 12-hour or 24-hour clock mode, then press Enter and finish setting the time.