f5
Moderate
LG · Ovens & Ranges
Lower oven thermistor short error - short circuit detected in lower sensor
Quick Answer
Error code F5 on your LG Ovens & Ranges means: Lower oven thermistor short error - short circuit detected in lower sensor. This is usually fixable — see the step-by-step guide below.
Affected Models
Specific models affected
Likely Causes
How to Fix It
1
Step 1: Press the CLEAR/OFF key and retry the function.
2
Step 2: Turn off the circuit breaker for 30 seconds and restore power.
3
Step 3: Examine the lower sensor wire harness for signs of damage, pinching, or bare wires touching metal.
4
Step 4: Test the resistance of the lower thermistor with a multimeter. A reading much lower than 1,080 ohms suggests a short.
5
Step 5: Replace the thermistor and repair any damaged wiring.
6
Step 6: If the sensor and wiring test good, the main control board may need replacement.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Lower oven temperature sensor
Wire harness
Main control board (if diagnosed)
Multimeter
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