ErrorCodeDoctor
LG Microwave F2 error code
The F2 error means your LG microwave detected a problem with the thermistor — the temperature sensor that monitors heat levels inside the unit. The thermistor has caused the internal temperature to go outside the safe operating range. This is a serious fault that requires a professional repair. Do not attempt to continue using the microwave as operating outside the safe temperature range can damage internal components or create a safety hazard.
Common causes
- Thermistor has malfunctioned and is causing the microwave to operate outside the safe temperature range
- Internal temperature exceeded safe limits due to a heating component fault
- Thermistor wiring is damaged causing incorrect temperature readings
How to fix it
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1
Stop using the microwave immediately
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2
Unplug the microwave from the outlet
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3
Contact a qualified technician to inspect and replace the thermistor
Related LG Microwave error codes
F2 error — frequently asked questions
What does the F2 error mean on a LG microwave?
The thermistor detected that the temperature is out of the safe operating range
What causes the F2 error?
The F2 error is usually caused by: Thermistor has malfunctioned and is causing the microwave to operate outside the safe temperature range; Internal temperature exceeded safe limits due to a heating component fault; Thermistor wiring is damaged causing incorrect temperature readings.
Can I fix the F2 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 F2 error?
Fixing the F2 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 F2 error?
We'd recommend addressing the F2 error before continuing to use the microwave, since hard-rated issues often involve a real fault rather than a minor glitch.