LG Microwave Error Codes & Troubleshooting

Complete LG Microwave Oven Repair Guide

F1
Keypad Error
  • Check control panel for stuck buttons.
  • Clean keypad surface.
  • Reset power supply.
  • Replace control panel if needed.
F3
Temperature Sensor Fault
  • Inspect thermistor wiring.
  • Check sensor connection.
  • Allow unit to cool down.
  • Replace sensor if faulty.
F4
Door Switch Error
  • Ensure door is fully closed.
  • Check door latch alignment.
  • Inspect door switch mechanism.
  • Replace door switch if defective.
F5
Magnetron Failure
  • Unplug microwave immediately.
  • Check high-voltage components.
  • Inspect magnetron condition.
  • Professional repair required.
F6
Inverter Error
  • Check inverter board connections.
  • Inspect power supply stability.
  • Reset unit.
  • Replace inverter if needed.
SE
Sensor Error
  • Check internal sensor wiring.
  • Clean control board area.
  • Restart microwave.
  • Replace sensor if necessary.
E11
Main PCB Failure
  • Disconnect power for 10 minutes.
  • Inspect PCB for damage.
  • Check wiring harness.
  • Replace control board if needed.
E13
Touch Panel Communication Error
  • Clean control panel surface.
  • Check ribbon cable connection.
  • Restart unit.
  • Replace touch panel if faulty.
E14
Overheating Detected
  • Allow microwave to cool down.
  • Check ventilation openings.
  • Avoid overuse.
  • Inspect cooling fan.
E15
Cooling Fan Malfunction
  • Check fan for obstruction.
  • Inspect fan motor wiring.
  • Clean internal dust buildup.
  • Replace fan if not working.
Important: Microwave repairs involving high-voltage components should only be performed by qualified technicians.