Error Code F9
Upper oven no heating
Moderate
Address soon - your appliance may not work properly
Also displayed as: F9
How to Fix
- 1
Unplug the unit.
- 2
Check if any connector is disconnected or loose: check all electrical wiring of Main PCB and electric elements.
- 3
If connector is loose or disconnected, reconnect and retest.
- 4
Check resistance of each igniter. Upper Broil igniter: 50–500 Ω at room temperature. Upper Bake igniter: 50–500 Ω at room temperature. If infinite (open), replace the failed igniter.
- 5
Check thermistor resistance: Normal approximately 1.09 kΩ at 77°F (25°C). Check at CN60 pins 4 and 5, and CN61 pins 5 and 6 of Main PCB.
- 6
If thermistor is abnormal, replace the oven temperature sensor.
- 7
Plug in unit and verify thermistor value in test mode: Press CLEAR, press upper BAKE and BROIL simultaneously, press BAKE and BROIL simultaneously again. Display should show current oven temp between 70°F and 90°F at room temperature.
- 8
Confirm oven gas shut-off valve (located behind the range) is fully open.
- 9
If igniters and sensor are normal but F9 persists, replace the Main PCB.
This Error Applies To
LG LDG431 Series Ovens & Ranges