ErrorCodeDoctor
LG Microwave F17 error code
The F17 error means your LG microwave has detected a problem with the temperature sensor — the component that monitors heat levels inside the cavity during cooking. Without an accurate temperature reading the microwave cannot regulate cooking safely. There are no user steps to resolve this error and the unit requires a professional repair service to inspect and replace the faulty temperature sensor.
Common causes
- Temperature sensor has malfunctioned or failed completely
- Wiring connection to the temperature sensor is loose or damaged
- Internal fault in the temperature sensor circuit
How to fix it
-
1
Disconnect the microwave from power for about a minute and plug it back in to attempt a reset
-
2
If F17 returns after resetting the temperature sensor needs inspection and replacement by a qualified technician
Related LG Microwave error codes
F17 error — frequently asked questions
What does the F17 error mean on a LG microwave?
The temperature sensor has detected a fault
What causes the F17 error?
The F17 error is usually caused by: Temperature sensor has malfunctioned or failed completely; Wiring connection to the temperature sensor is loose or damaged; Internal fault in the temperature sensor circuit.
Can I fix the F17 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 F17 error?
Fixing the F17 error on a LG microwave typically costs $80–$250, depending on parts and whether you do it yourself or hire a technician.
Is it safe to keep using my microwave with the F17 error?
We'd recommend addressing the F17 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.