Error Code F4
Lower oven sensor open — oven thermistor is open circuit
Moderate
Address soon - your appliance may not work properly
Also displayed as: F4
How to Fix
- 1
Unplug the unit.
- 2
Check sensor connector for looseness or disconnection at CN61 pins 5 and 6 of Main PCB.
- 3
Measure thermistor resistance — normal is approximately 1.09 kΩ at 75°F (25°C).
- 4
If resistance is infinite (open), replace the lower oven temperature sensor.
- 5
If resistance is normal, enter test mode and verify thermistor reading is between 70°F and 90°F at room temperature.
- 6
If test mode value is abnormal, replace the Main PCB.
- 7
Reconnect all wiring and test oven for normal operation.
This Error Applies To
LG LTG4715 Series Ovens & Ranges (2018) (2018–present)
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