F9Serious
LG Oven/Range F9 Error Code
The oven temperature has exceeded the safe limit, typically above 550°F.
Common causes
- Stuck oven relay
- Faulty oven temperature sensor
- Cooling fan not operating
How to fix it
- Turn off the oven and let it cool completely.
- Check for any obstructions blocking the cooling fan.
- Reset the oven by unplugging for 5 minutes and plugging back in.
⚠ When to call a pro: If the error persists after reset and cooling fan inspection, call a technician to test the relay board and sensor.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.