f1
Moderate
LG · Ovens & Ranges
Upper oven thermistor error - temperature sensor open or shorted
Quick Answer
Error code F1 on your LG Ovens & Ranges means: Upper oven thermistor error - temperature sensor open or shorted. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Step 1: Press the CLEAR/OFF key on the control panel and try the original function again.
2
Step 2: If the error reappears, turn off the circuit breaker to the range for 30 seconds, then turn it back on.
3
Step 3: If the error persists, unplug the range and locate the upper oven temperature sensor probe inside the oven cavity (usually mounted on the back wall).
4
Step 4: Check the sensor wire harness connection at the back of the range for loose or corroded terminals.
5
Step 5: Use a multimeter to test the sensor resistance. At room temperature (77F), it should read approximately 1,080-1,100 ohms.
6
Step 6: If the sensor reads outside this range or shows no continuity, replace the temperature sensor.
7
Step 7: If the sensor tests good, the main control board may be faulty.
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
Oven temperature sensor probe
Wire harness (if damaged)
Multimeter
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