Error Code F1

Sensor open — oven thermistor is open circuit

What This Means

Oven temperature sensor wire broken or disconnected; Loose connector at oven sensor or at Main PCB CN31 pins 4 and 5; Failed oven temperature sensor (open)

How to Fix

1. 1

   Unplug the unit from power

2. 2

   Check the oven sensor connector at CN31 pins 4 and 5 of the Main PCB for looseness or disconnection; reconnect if loose

3. 3

   With power disconnected, measure resistance of oven thermistor — normal is approximately 1.09 kOhm at 25C (77F); if infinite (open), replace the thermistor

4. 4

   Plug in the unit and enter test mode: press any button to place encoder in Off, then press buttons in order (+, Oven Light — hold Oven Light 3 seconds), press Oven Light again (hold 3 seconds), select 't3' with + button, press START — current oven temperature displays

5. 5

   Normal thermistor reading in test mode is 70F to 90F at room temperature; if abnormal with good wiring, replace Relay PCB

6. 6

   If the same phenomenon occurs after replacing Relay PCB, replace the Main PCB

This Error Applies To

LG LSG4513 Series Ovens & Ranges (2015) (2015–present)