F1Warning
LG Oven/Range F1 Error Code
The oven temperature sensor is open (infinite resistance).
Common causes
- Faulty oven temperature sensor
- Broken wire in sensor circuit
- Control board connector issue
How to fix it
- Unplug range and check sensor resistance; should be finite (around 1100 ohms).
- Visually inspect sensor wire for breaks.
⚠ When to call a pro: If sensor shows infinite resistance, replace it. If error continues, a technician should check the control board.
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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.