LG Oven Error Code F3
Oven temperature sensor short circuit
The oven temperature sensor is reading abnormally low resistance (short circuit). This can cause the oven to incorrectly detect very high temperatures.
What Does Error Code F3 Mean on a LG Oven?
Oven temperature sensor short circuit.
The oven temperature sensor is reading abnormally low resistance (short circuit). This can cause the oven to incorrectly detect very high temperatures.
What Causes Error Code F3?
Here are the most common causes in order of frequency. Start with the most likely cause before moving to the next:
- 1 Sensor shorted internally 65% of cases
- 2 Pinched wiring causing short to chassis 25% of cases
- 3 Control board sensor input shorted 10% of cases
How to Fix LG Oven Error Code F3
- 1
Test the sensor
At room temp, LG sensor should read ~1,080 ohms. Near 0 = shorted.
🔩 Multimeter - 2
Inspect wiring
Check sensor wiring from probe to connector for any pinch points.
- 3
Replace the sensor
A shorted sensor cannot be repaired.
🔩 LG oven temperature sensor ($25–$55)
How to Reset Error Code F3
After replacing sensor, test with 350°F bake cycle.
Note: If the error returns after resetting, the underlying issue has not been resolved. Work through the fix steps above.
When to Call a Professional
If new sensor shows correct resistance but F3 persists, control board sensor input is shorted.
Related Error Codes
Same Code on Other Brands
Error code F3 appears on these other brands too. Click to compare:
Find Replacement Parts
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