How do I fix error code F-6 on a LG ovens & ranges?

1. undefined: Unplug the unit. 2. undefined: Measure resistance of heater relay (Broil Heater Relay: Tap 09 and Tap 07 = Ry5; Conv. Heater Relay: Tap 09 and Tap 08 = Ry6). Normal = infinite (open). Abnormal = shorted. If shorted relay found, replace the Relay PCB. 3. undefined: Measure resistance of thermistor at pins 5 and 6 of CN6 of Main PCB. Normal = approximately 1.09 kΩ at 25°C. If abnormal, replace the defective thermistor. 4. undefined: Plug in the unit and measure DLB relay (Tap 01 and Tap 02 = Ry1). Normal = infinite (open). Abnormal = shorted. If abnormal, replace the Relay PCB. 5. undefined: Enter test mode (press any button with Mode knob in Off, then press '4' and '6' simultaneously for 1 second, then press '4' and '6' simultaneously for 1 second again, then press '3'). Check thermistor value — normal at room temp is 70°F to 90°F. If thermistor value is normal, replace the Main PCB.

LG Ovens & Ranges

Error Code F-6

Oven Overheating

Moderate

Address soon - your appliance may not work properly

Also displayed as: F-6

How to Fix

1
Unplug the unit.
2
Measure resistance of heater relay (Broil Heater Relay: Tap 09 and Tap 07 = Ry5; Conv. Heater Relay: Tap 09 and Tap 08 = Ry6). Normal = infinite (open). Abnormal = shorted. If shorted relay found, replace the Relay PCB.
3
Measure resistance of thermistor at pins 5 and 6 of CN6 of Main PCB. Normal = approximately 1.09 kΩ at 25°C. If abnormal, replace the defective thermistor.
4
Plug in the unit and measure DLB relay (Tap 01 and Tap 02 = Ry1). Normal = infinite (open). Abnormal = shorted. If abnormal, replace the Relay PCB.
5
Enter test mode (press any button with Mode knob in Off, then press '4' and '6' simultaneously for 1 second, then press '4' and '6' simultaneously for 1 second again, then press '3'). Check thermistor value — normal at room temp is 70°F to 90°F. If thermistor value is normal, replace the Main PCB.