Error Code F-9

No Heating — Starting oven temperature does not exceed 150°F and temperature is less than or equal to starting temperature after 5 minutes of preheating with door closed

Also displayed as: F-9

How to Fix

1. 1

   Unplug the unit.

2. 2

   Check all connectors on the Relay PCB and electric wiring connections for the bake and convection circuits. If loose or disconnected, reconnect or fix harness.

3. 3

   Measure resistance of each igniter after cooling to room temperature. Bake igniter normal range: 45 Ω – 400 Ω; convection igniter normal: 50 Ω – 500 Ω. If abnormal (open or short), replace the failed igniter.

4. 4

   Measure thermistor resistance at pins 5 and 6 of CN6 on Main PCB. Normal = approximately 1.09 kΩ at 25°C. If abnormal, replace the thermistor.

5. 5

   Enter test mode (press any button with Mode knob in Off, press '4'+'6' for 1 second, press '4'+'6' again for 1 second). Select 'tO' by pressing 0, then START to cycle through relay sequence. Verify bake and convection relays are activating.

6. 6

   If relays are not activating correctly, replace the Relay PCB (P/N: EBR31737804).

7. 7

   If problem persists after replacing Relay PCB, replace the Main PCB (P/N: EBR32028304).

8. 8

   Also verify the oven gas shut-off valve is fully open and gas supply is present.

This Error Applies To

LG LSGL6335 Series Ovens & Ranges (2021) (2021–present)