ErrorCodeDoctor
LG · Microwave

LG Microwave F15 error code

Difficulty: Hard · Cost: $100–$300 · Duration: Requires professional service

The F15 error means your LG microwave detected an abnormal voltage condition. Like F13 and F14 this is a voltage fault representing a different condition within the electrical circuit. There are no user steps to resolve this error and the unit requires a professional repair service.

Common causes

  • Abnormal voltage detected in the microwave's electrical circuit
  • Power surge or unstable home electrical supply
  • Internal voltage regulating component has malfunctioned

How to fix it

  1. 1

    Disconnect the microwave from power for about a minute and plug it back in to attempt a reset

  2. 2

    Make sure the microwave is plugged directly into a dedicated wall outlet — not a power strip or extension cord

  3. 3

    If F15 returns after resetting contact a qualified technician to inspect the internal voltage components

Related LG Microwave error codes

1

E10

The control board has detected an internal short circuit

hard
2

F1

A fault was detected in the main control board

hard
3

F2

The thermistor detected that the temperature is out of the safe operating range

hard
4

F3

A fault was detected in the control panel

hard

F15 error — frequently asked questions

What does the F15 error mean on a LG microwave?

A voltage error was detected

What causes the F15 error?

The F15 error is usually caused by: Abnormal voltage detected in the microwave's electrical circuit; Power surge or unstable home electrical supply; Internal voltage regulating component has malfunctioned.

Can I fix the F15 error myself?

This is rated a hard fix — it often requires tools, parts, or experience, and may be safer left to a professional technician.

How much does it cost to fix the F15 error?

Fixing the F15 error on a LG microwave typically costs $100–$300, depending on parts and whether you do it yourself or hire a technician.

Is it safe to keep using my microwave with the F15 error?

We'd recommend addressing the F15 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.