What does LG microwave error code F-16 mean?

F-16 indicates a heating abnormality. Never run the microwave empty. Unplug for 1 minute, place a cup of water inside, and test. If the error persists, the magnetron or waveguide may need professional repair.

F-16

LG Microwave Error Code F-16 — Heating Issue Detected

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

What this means

The F-16 error code indicates the microwave has detected a heating issue. This could mean the magnetron is not producing adequate microwave energy, the waveguide cover is damaged, or the cavity is reflecting energy back abnormally. Running the microwave empty can also trigger this error.

Alternate codes: F16

Step-by-step fix

2 steps

Never run empty

Ensure food or a microwave-safe container with water is always inside when running the microwave. Running empty can damage the magnetron.

Unplug and reset

Unplug for 1 minute, plug back in, place a cup of water inside, and try a 1-minute cook cycle.

When to call a professional

Magnetron and waveguide repairs are dangerous and require a qualified technician.

Related error codes

F-17

The internal temperature sensor is malfunctioning.

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.

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Parts you may need

Magnetron

Part #Varies by model · $80–$200

If the magnetron has failed

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Quick Info

BrandLG

ApplianceMicrowave

Error CodeF-16

DifficultyAdvanced Fix

Est. TimeN/A (professional repair needed)