LG Microwaves Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
dE
Microwave displays dE and will not start; often indicates the door is not detected as closed.
Door Error (Door Not Properly Closed or Switch Not Engaged)
E1
Microwave displays E1 and will not start cooking.
Open Humidity Sensor or Sensor Circuit
E2
Microwave shows E2 during or after a sensor cooking cycle; may stop cooking prematurely.
Abnormal Humidity Sensor Reading (Over/Under Range)
E3
Microwave displays E3 and stops heating; often associated with sensor cooking or auto reheat.
Cavity Temperature Sensor Error (Overheat or Open Circuit)
E4
Microwave shows E4 and may shut down during cooking, especially at high power.
Magnetron Overheat or Thermal Cutout Trip
E5
Microwave displays E5 and will not start or stops shortly after starting.
Inverter Power Supply Error (Inverter Models)
E6
Microwave shows E6 and may not heat or may shut off during cooking.
Inverter-Magnetron Communication or Load Error
E7
Microwave displays E7 and will not start; sometimes appears after a power outage.
Main PCB Internal Error or EEPROM Fault
E9
Microwave shows E9 and will not start; may be accompanied by a door open/close chime.
Door Latch or Interlock Switch Error
F1
Microwave will not start; display shows F1 shortly after pressing START or when plugging in the unit.
Keypad or Control Panel Short
F2
Microwave beeps and displays F2; may occur when trying to start cooking or randomly during idle.
Stuck or Shorted Key on Membrane Keypad
F3
Microwave stops heating and displays F3; may appear immediately after pressing START or during cooking.
Shorted Temperature Sensor or Thermistor Circuit
F4
Microwave displays F4 and will not start or stops mid-cycle.
Open or Shorted Humidity Sensor Circuit
F5
Microwave shows F5 and will not run; may occur after a power surge or during cooking.
Control Board Relay or Power Circuit Failure
F6
Microwave displays F6 and may not respond to keypad input or may shut down unexpectedly.
Communication Error Between Keypad and Main PCB
F9
Microwave shows F9 and will not start; sometimes accompanied by a clicking sound from inside.
Door Sensing or Latch Switch Error
H0
Microwave display shows H0 or HO; unit may not heat or may be in a demo/hold mode.
Demo Mode or Hold Mode Active
LOC
Microwave display shows LOC or a lock icon; keypad does not respond to most buttons.
Child Lock (Control Lock) Enabled
PF
Microwave display shows PF and beeps after a power interruption; clock may be reset.
Power Failure Indication
SE
Microwave beeps repeatedly and displays SE; keypad may act as if buttons are being pressed by themselves.
Keypad Short (Stuck Key Error)
Symptom
Control panel buttons are unresponsive or respond intermittently; display is on.
Keypad or Touch Panel Failure
Symptom
Microwave display is dim, flickering, or some segments are missing, but unit otherwise operates.
Display Module or Power Supply Degradation
Symptom
Microwave display is on but START button does nothing; timer does not count down and no relay click is heard.
Start Circuit or Door Interlock Not Engaging
Symptom
Microwave door is difficult to open or close, or does not latch securely.
Door Latch or Hinge Misalignment
Symptom
Microwave fan runs whenever the unit is plugged in, even when not cooking.
Stuck Cooling Fan Relay or Sensor Logic Fault
Symptom
Microwave interior light does not turn on when door opens or during cooking, but unit heats normally.
Cavity Lamp Failure
Symptom
Microwave interior rusting, peeling paint, or exposed metal inside the cavity.
Cavity Coating Degradation
Symptom
Microwave leaks steam, condensation, or small amounts of water around the door or on the control panel.
Condensation and Minor Moisture Leakage
Symptom
Microwave light, fan, or turntable runs when the door is closed but no cook cycle is set, or continues running after cycle ends.
Stuck Relay or Door Switch Miswiring
Symptom
Microwave makes loud buzzing or humming noise while running, louder than normal, with reduced or no heating.
High-Voltage System Load or Short
Symptom
Microwave makes loud rattling, vibrating, or metallic noises during operation, even with normal heating.
Mechanical Vibration or Loose Component
Symptom
Microwave runs but does not heat food; turntable rotates and light is on, but food remains cold.
No Microwave Generation (Heating Failure)
Symptom
Microwave runs but heats very slowly; food is warm but not hot after normal cooking time.
Reduced Microwave Output
Symptom
Microwave stops mid-cycle and resets or goes blank, then comes back on; may trip the household breaker.
Intermittent Power Loss or Overcurrent
Symptom
Microwave turntable rotates intermittently or makes grinding/clicking noises while turning.
Turntable Mechanical Noise / Intermittent Drive
Symptom
Microwave will not start at all; display is blank and no lights or sounds when door is opened.
No Power / Dead Unit
Symptom
Over-the-range LG microwave exhaust fan does not run or runs only at one speed.
Exhaust Fan Motor or Control Failure
Symptom
Over-the-range LG microwave surface lights (cooktop lights) do not work or are stuck on one brightness.
Cooktop Lamp or Control Circuit Failure
Symptom
Strong burning, electrical, or chemical smell during or after microwave operation.
Overheating Component or Cavity Contamination
Symptom
Turntable does not rotate during cooking, but microwave heats normally.
Turntable Drive Failure
Symptom
Visible sparks (arcing) or popping sounds inside the microwave cavity during cooking.
Cavity Arcing / Insulation Breakdown
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| dE |
Microwave displays dE and will not start; often indicates the door is not detected as closed.
|
Door Error (Door Not Properly Closed or Switch Not Engaged) | View Details |
| E1 |
Microwave displays E1 and will not start cooking.
|
Open Humidity Sensor or Sensor Circuit | View Details |
| E2 |
Microwave shows E2 during or after a sensor cooking cycle; may stop cooking prematurely.
|
Abnormal Humidity Sensor Reading (Over/Under Range) | View Details |
| E3 |
Microwave displays E3 and stops heating; often associated with sensor cooking or auto reheat.
|
Cavity Temperature Sensor Error (Overheat or Open Circuit) | View Details |
| E4 |
Microwave shows E4 and may shut down during cooking, especially at high power.
|
Magnetron Overheat or Thermal Cutout Trip | View Details |
| E5 |
Microwave displays E5 and will not start or stops shortly after starting.
|
Inverter Power Supply Error (Inverter Models) | View Details |
| E6 |
Microwave shows E6 and may not heat or may shut off during cooking.
|
Inverter-Magnetron Communication or Load Error | View Details |
| E7 |
Microwave displays E7 and will not start; sometimes appears after a power outage.
|
Main PCB Internal Error or EEPROM Fault | View Details |
| E9 |
Microwave shows E9 and will not start; may be accompanied by a door open/close chime.
|
Door Latch or Interlock Switch Error | View Details |
| F1 |
Microwave will not start; display shows F1 shortly after pressing START or when plugging in the unit.
|
Keypad or Control Panel Short | View Details |
| F2 |
Microwave beeps and displays F2; may occur when trying to start cooking or randomly during idle.
|
Stuck or Shorted Key on Membrane Keypad | View Details |
| F3 |
Microwave stops heating and displays F3; may appear immediately after pressing START or during cooking.
|
Shorted Temperature Sensor or Thermistor Circuit | View Details |
| F4 |
Microwave displays F4 and will not start or stops mid-cycle.
|
Open or Shorted Humidity Sensor Circuit | View Details |
| F5 |
Microwave shows F5 and will not run; may occur after a power surge or during cooking.
|
Control Board Relay or Power Circuit Failure | View Details |
| F6 |
Microwave displays F6 and may not respond to keypad input or may shut down unexpectedly.
|
Communication Error Between Keypad and Main PCB | View Details |
| F9 |
Microwave shows F9 and will not start; sometimes accompanied by a clicking sound from inside.
|
Door Sensing or Latch Switch Error | View Details |
| H0 |
Microwave display shows H0 or HO; unit may not heat or may be in a demo/hold mode.
|
Demo Mode or Hold Mode Active | View Details |
| LOC |
Microwave display shows LOC or a lock icon; keypad does not respond to most buttons.
|
Child Lock (Control Lock) Enabled | View Details |
| PF |
Microwave display shows PF and beeps after a power interruption; clock may be reset.
|
Power Failure Indication | View Details |
| SE |
Microwave beeps repeatedly and displays SE; keypad may act as if buttons are being pressed by themselves.
|
Keypad Short (Stuck Key Error) | View Details |
| – |
Control panel buttons are unresponsive or respond intermittently; display is on.
|
Keypad or Touch Panel Failure | View Details |
| – |
Microwave display is dim, flickering, or some segments are missing, but unit otherwise operates.
|
Display Module or Power Supply Degradation | View Details |
| – |
Microwave display is on but START button does nothing; timer does not count down and no relay click is heard.
|
Start Circuit or Door Interlock Not Engaging | View Details |
| – |
Microwave door is difficult to open or close, or does not latch securely.
|
Door Latch or Hinge Misalignment | View Details |
| – |
Microwave fan runs whenever the unit is plugged in, even when not cooking.
|
Stuck Cooling Fan Relay or Sensor Logic Fault | View Details |
| – |
Microwave interior light does not turn on when door opens or during cooking, but unit heats normally.
|
Cavity Lamp Failure | View Details |
| – |
Microwave interior rusting, peeling paint, or exposed metal inside the cavity.
|
Cavity Coating Degradation | View Details |
| – |
Microwave leaks steam, condensation, or small amounts of water around the door or on the control panel.
|
Condensation and Minor Moisture Leakage | View Details |
| – |
Microwave light, fan, or turntable runs when the door is closed but no cook cycle is set, or continues running after cycle ends.
|
Stuck Relay or Door Switch Miswiring | View Details |
| – |
Microwave makes loud buzzing or humming noise while running, louder than normal, with reduced or no heating.
|
High-Voltage System Load or Short | View Details |
| – |
Microwave makes loud rattling, vibrating, or metallic noises during operation, even with normal heating.
|
Mechanical Vibration or Loose Component | View Details |
| – |
Microwave runs but does not heat food; turntable rotates and light is on, but food remains cold.
|
No Microwave Generation (Heating Failure) | View Details |
| – |
Microwave runs but heats very slowly; food is warm but not hot after normal cooking time.
|
Reduced Microwave Output | View Details |
| – |
Microwave stops mid-cycle and resets or goes blank, then comes back on; may trip the household breaker.
|
Intermittent Power Loss or Overcurrent | View Details |
| – |
Microwave turntable rotates intermittently or makes grinding/clicking noises while turning.
|
Turntable Mechanical Noise / Intermittent Drive | View Details |
| – |
Microwave will not start at all; display is blank and no lights or sounds when door is opened.
|
No Power / Dead Unit | View Details |
| – |
Over-the-range LG microwave exhaust fan does not run or runs only at one speed.
|
Exhaust Fan Motor or Control Failure | View Details |
| – |
Over-the-range LG microwave surface lights (cooktop lights) do not work or are stuck on one brightness.
|
Cooktop Lamp or Control Circuit Failure | View Details |
| – |
Strong burning, electrical, or chemical smell during or after microwave operation.
|
Overheating Component or Cavity Contamination | View Details |
| – |
Turntable does not rotate during cooking, but microwave heats normally.
|
Turntable Drive Failure | View Details |
| – |
Visible sparks (arcing) or popping sounds inside the microwave cavity during cooking.
|
Cavity Arcing / Insulation Breakdown | View Details |
No matching codes found
Advertisements