F9 Moderate Moderate DIY
LG Range F9 — Oven Not Heating Properly
LG Oven · Error code F9
What F9 Means
F9 means the upper oven is not reaching temperature in the expected time.
Most Likely Fix
Oven not heating to set temperature in time
PartBake element (electric) or igniter (gas)
Typical cost$30-90
Difficultymoderate
Time45 min
Tools: screwdriver, nut driver
Diagnose first: Burned-out bake element (electric) or weak gas igniter; a drifting RTD sensor will also trigger this.
Find this part on Amazon →If the primary fix doesn't resolve it:
PartOven temperature sensor (RTD)
Typical cost$20-50
Symptoms
- Oven slow to heat or never reaches temp
- F9 on the display
Common Causes
1
Failed heating element
A weak or open bake element.
2
Relay/control fault
The control is not driving the element correctly.
3
Wiring fault
A loose element connection.
How to Fix It
- Reset at the breaker for 30 seconds.
- Test the bake element and its connections.
- Replace a failed element; if good, the control board may need service.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More LG Oven Codes
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.