F-13

LG Microwave Error Code F-13 / F-14 / F-15 — Voltage Error

Advanced Fix N/A (professional repair needed) No tools needed

What this means

Error codes F-13, F-14, and F-15 indicate voltage-related errors in the microwave's inverter circuit. These can be caused by power supply fluctuations, a failing inverter board, or a deteriorating magnetron drawing abnormal current. The specific code may vary by model but they all point to electrical supply or regulation issues within the inverter system.

Alternate codes: F13, F-14, F14, F-15, F15

Step-by-step fix

2 steps
1

Unplug and reset

Unplug the microwave for 1 minute, then plug it back in.

2

Check the power source

Ensure the microwave is plugged into a dedicated circuit (not shared with other high-draw appliances). Plug directly into a wall outlet, not a power strip.

When to call a professional

Voltage errors in microwaves involve dangerous high-voltage components. Professional service is mandatory.

Related error codes

F-11

The control board and inverter board have lost communication.

Advanced Fix · N/A (professional repair needed)
F-16

The microwave detected a heating abnormality.

Advanced Fix · N/A (professional repair needed)

Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.

Learn more about our sources

Parts you may need

Inverter Board

Part #Varies by model · $60–$150

If the inverter board has failed

Find Part

Links may earn us a commission at no extra cost to you. We only recommend parts relevant to this repair.

Quick Info

BrandLG
ApplianceMicrowave
Error CodeF-13
DifficultyAdvanced Fix
Est. TimeN/A (professional repair needed)