Error Code F-1

Opened Sensor — oven thermistor (sensor) remains open for over 1 minute during cooking

What This Means

Disconnected or loose oven sensor connector; Broken oven temperature sensor wiring; Failed oven temperature sensor (thermistor); Loose CN6 connector on Main PCB

How to Fix

1. 1

   Enter diagnostic mode: press any button with mode knob in Off, then press '4' and '6' simultaneously for 1 second to read stored F-code from EEPROM

2. 2

   Unplug the unit

3. 3

   Check the oven sensor wiring connector at the oven back wall — reconnect if loose or disconnected

4. 4

   Check CN6 connector (pins 5 and 6) on Main PCB — reconnect if loose

5. 5

   Plug in unit, re-enter test mode: press '4' and '6' simultaneously, select 'tO', press START

6. 6

   Unplug unit, measure thermistor resistance at pins 5 and 6 of CN6 on Main PCB — normal is approximately 1.09 kΩ at 25°C (77°F)

7. 7

   If resistance is infinite (open), replace the oven temperature sensor

8. 8

   If sensor resistance is normal, replace Main PCB

9. 9

   If issue persists after Main PCB replacement, replace Relay/Power PCB

This Error Applies To

LG LSGL6337 Series Ovens & Ranges (2021) (2021–present)