What does LG microwave error code F-19 mean?

F-19 indicates a heating system problem similar to F-16. Unplug for 1 minute and test with a cup of water. If it persists, the magnetron or other high-voltage components need professional repair.

F-19

LG Microwave Error Code F-19 — Heating Issue Detected (Secondary)

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

What this means

The F-19 error code is a secondary heating issue indicator, similar to F-16. It typically indicates the microwave detected that the magnetron or its support circuitry is not generating heat as expected. This can be caused by a failing magnetron, a diode failure, or a high-voltage capacitor issue.

Alternate codes: F19

Step-by-step fix

1 steps

Unplug and reset

Unplug the microwave for 1 minute, plug back in, and test with a cup of water.

When to call a professional

This error involves high-voltage components (magnetron, diode, capacitor). Professional service is mandatory. Do not open the microwave cabinet.

Related error codes

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

Magnetron

Part #Varies by model · $80–$200

If the magnetron has failed

Find Part

High Voltage Diode

Part #Varies by model · $15–$30

If the diode 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-19

DifficultyAdvanced Fix

Est. TimeN/A (professional repair needed)