F2 — Upper Oven Thermistor Error
Per LG's official range error-code list, F2 is the Upper Oven Thermistor Error — the upper oven's temperature sensor is reading out of range. (Door-lock faults are separate codes: F10 for the upper oven, F20 for the lower oven.)
- Keep using it?
- Yes, with caution
- DIY difficulty
- Moderate
- Typical cost
- $60-140
- Verified against
- lg.com ↗
The fix
Door lock motor / latch assembly
Oven door latch / lock switch fault
Diagnose first: Self-clean latch motor or its microswitch fails; common after the first few clean cycles.
Find this part on Amazon →As an Amazon Associate we earn from qualifying purchases.
How to fix it
- Unplug the range or shut off power at the breaker.
- Locate the upper oven temperature sensor (thermistor), usually mounted on the rear oven wall.
- Inspect and reseat its wiring connector.
- Test the sensor's resistance against LG's spec at room temperature; replace if out of range.
- If diagnosis confirms the fault, replace the upper oven thermistor (typical cost $20-40, about 45 min, moderate DIY).
Why it happens
Typical signs: F2 shown on the display · Oven temperature reads incorrectly or oven will not heat properly
- Most likely: Upper oven thermistor (temperature sensor) The sensor has failed open/shorted or is reading out of its expected range.
- Thermistor wiring or connector A loose or damaged connection between the thermistor and the control can produce the same fault.
Other parts sometimes needed
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
- LG range upper oven temperature sensor (thermistor) Common replacementAmazon →
Frequently asked questions
What does the F2 code mean on a LG range?
Per LG's official range error-code list, F2 is the Upper Oven Thermistor Error — the upper oven's temperature sensor is reading out of range. (Door-lock faults are separate codes: F10 for the upper oven, F20 for the lower oven.)
What causes the F2 code on a LG range?
Most likely: Upper oven thermistor (temperature sensor): The sensor has failed open/shorted or is reading out of its expected range. Thermistor wiring or connector: A loose or damaged connection between the thermistor and the control can produce the same fault.
Is it safe to keep using a LG range with a F2 error?
Yes, with caution. This is rated a moderate-severity fault.
How do I fix F2 on a LG range?
Unplug the range or shut off power at the breaker. Locate the upper oven temperature sensor (thermistor), usually mounted on the rear oven wall. Inspect and reseat its wiring connector.
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.