ErrorCodeDoctor
LG Microwave F19 error code
The F19 error means your LG microwave detected a problem with the heating system. This is similar to the F16 error but represents a different heating fault condition. The microwave cannot heat food safely when this error is active. Do not continue using the microwave until the fault has been resolved. There are no user steps to fix this error and the unit requires a professional repair service.
Common causes
- Magnetron or heating component has malfunctioned or failed
- Heating system fault detected during operation
- Internal component overheating causing the heating circuit to trip
How to fix it
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1
Disconnect the microwave from power for about a minute and plug it back in to attempt a reset
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2
If F19 returns after resetting stop using the microwave and contact a qualified technician to inspect the heating components
Related LG Microwave error codes
F19 error — frequently asked questions
What does the F19 error mean on a LG microwave?
A heating fault was detected
What causes the F19 error?
The F19 error is usually caused by: Magnetron or heating component has malfunctioned or failed; Heating system fault detected during operation; Internal component overheating causing the heating circuit to trip.
Can I fix the F19 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 F19 error?
Fixing the F19 error on a LG microwave typically costs $100–$350, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my microwave with the F19 error?
We'd recommend addressing the F19 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.