Error Code F9

Oven no heating — oven temperature does not exceed 150°F and stays at or below starting temperature for over 5 minutes during preheating with door closed

What This Means

Loose or open wiring to Power PCB or heating elements; Failed broil heater (~13.5Ω expected); Failed convection heater (~23Ω expected); Failed oven sensor; Failed Main PCB or Power PCB

How to Fix

1. 1

   Unplug unit

2. 2

   Check all wiring connectors at Power PCB (all taps) and electric element connections; reconnect any loose connections

3. 3

   Measure broil heater resistance: normal ~13.5Ω; if open or abnormal, replace broil heater

4. 4

   Measure convection heater resistance: normal ~23Ω; if open or abnormal, replace convection heater

5. 5

   Plug unit in, enter test mode, navigate to t03, verify thermistor displays 70F-90F at room temperature

6. 6

   Unplug unit, measure thermistor resistance: normal ~1.09 kΩ at 25°C; if abnormal, replace thermistor

7. 7

   If all components test normal, replace Main PCB

8. 8

   If issue persists after Main PCB replacement, replace Power PCB

This Error Applies To

LG LSIL6332FE Series Ovens & Ranges (2024) (2024–present)