LG · Oven Moderate

F9 — LG Range F9 — Oven Not Heating Properly

F9 means the upper oven is not reaching temperature in the expected time.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Typical cost
$30-90
Verified against
lg.com ↗

The fix

Bake element (electric) or igniter (gas)

Oven not heating to set temperature in time

$30-90 moderate difficulty 45 min Tools: screwdriver, nut driver

Diagnose first: Burned-out bake element (electric) or weak gas igniter; a drifting RTD sensor will also trigger this.

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Didn't resolve it? Next suspect: Oven temperature sensor (RTD) ($20-50)

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How to fix it

  1. Reset at the breaker for 30 seconds.
  2. Test the bake element and its connections.
  3. Replace a failed element; if good, the control board may need service.

Why it happens

Typical signs: Oven slow to heat or never reaches temp · F9 on the display

  • Failed heating element A weak or open bake element.
  • Relay/control fault The control is not driving the element correctly.
  • Wiring fault A loose element connection.

Other parts sometimes needed

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • LG Oven Heating Element Common replacement
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Related repair guides

How to Replace an Oven Bake Element →Oven Not Heating or Not Reaching Temperature →

More LG oven codes

5b 5b — Sabbath Mode active (not a fault) CF1 CF1 — Left-front cooktop sensor open/short CF2 CF2 — Left-rear cooktop sensor open/short CF3 CF3 — Right-front cooktop sensor open/short CF4 CF4 — Rear Cooktop Sensor Error (Zone Varies by Model) F1 Range F1 — Upper Oven Thermistor Error

All LG codes → All oven codes →

Frequently asked questions

What does the F9 code mean on a LG oven?

F9 means the upper oven is not reaching temperature in the expected time.

What causes the F9 code on a LG oven?

Failed heating element: A weak or open bake element. Relay/control fault: The control is not driving the element correctly. Wiring fault: A loose element connection.

Is it safe to keep using a LG oven with a F9 error?

Yes, with caution. This is rated a moderate-severity fault.

How do I fix F9 on a LG oven?

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.

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: lg.com.