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LG Oven / Range · Error Code
CODE F9

LG F9Oven not heating / not reaching temp

An LG F9 means the oven isn't reaching temperature in the expected time — it's heating too slowly or not at all. On an electric oven that's usually a failed bake element (it should glow bright red); on a gas oven, a weak igniter that glows but never lights. A bad oven temp sensor can also cause it. Watch the element or burner to tell which path you're on.

🔧 From our repair bench: Watch the bake element on an electric LG — if it doesn't glow fully red, that's your F9. On gas, it's the igniter.

🐜 Straight talk: this points you at the likely cause — it's not a guarantee, and every machine is different. Cut the power (and shut off gas or water) before you touch anything, test to confirm the part is actually bad before you buy, and if it's beyond you, get a pro. No shame in that.

What the code means

F9: Oven not heating / not reaching temp

Oven not heating / not reaching temp.
Most likely causes
  • Bake Element Or Igniter
  • Bake Relay On Control
  • Oven Sensor
The 2-minute test → Confirm element/igniter draws; check the control relay + oven sensor. Confirm against the model tech sheet.
The kit

The Tools to Test + Fix With

You don't need a shop full of tools — you need these. The multimeter is the one that pays for itself the first time it stops you buying the wrong part on a fault code.

Digital multimeter

Test a suspect part for continuity BEFORE you buy — the single best way to avoid replacing the wrong thing on a fault code.

🔎 On Amazon →

Nut driver set (¼" + 5⁄16")

Most appliance panels are held on with ¼" and 5⁄16" hex screws.

🔎 On Amazon →

Screwdriver set (Phillips/flat/Torx)

Covers the odd panel screw and the Torx fasteners many brands use.

🔎 On Amazon →
Fix it — two honest options

The Fix — Free Checks First, Then the Part

Work top-down: the free checks before you spend a dime, and test to confirm the part is actually bad before you buy. When it is a part, you get both options — the genuine OEM part sourced through us and shipped to your door, or a budget aftermarket part on Amazon. Your call.

Moderate DIY$25–60

Bake element (electric)

If the element doesn't glow bright red or is visibly split. Two screws inside the oven — cut power first. Match your model.

Call a pro$25–60

Gas oven igniter (gas)

If the igniter glows but never lights the burner. Gas job — shut off gas + power, or call a pro.

Moderate DIY$15–40

Oven temperature sensor

If the element/igniter is fine but it still won't reach temp — a cold sensor reads ~1080Ω. Match your model.

Prices shown are typical aftermarket ranges and vary by brand and model — genuine OEM is priced by quote when you request it. Amazon links open a search so you can match your exact model number; as an Amazon Associate, Appliance Ant may earn from qualifying purchases at no extra cost to you. Always confirm the part fits your model.

Can you fix it yourself?

Safe to Try · Know the Risk · Call a Pro

General guidance, not professional advice. Always unplug the appliance (or shut off the gas/water) before you check anything. If it feels beyond you, that's exactly when to get a pro.

✅ Safe to try yourself

  • Turn on bake and watch — a healthy electric element glows bright red across its length; a gas igniter should light the burner.
  • Check for a tripped breaker (electric ovens are 240V).
  • Confirm the oven isn't in a delay/timer/Sabbath mode.

⚠️ Doable — know the risk

  • Electric bake element or temp-sensor swap — moderate; cut power at the breaker (240V) first.

🛑 Call a pro — don't touch this

  • Anything on a gas oven — igniter, valve, or a gas smell.
  • The 240V wiring or an oven control board.
Is it worth fixing?

The Honest Call

Worth it for an element or sensor ($15–60) versus $700+ for a new range. A gas igniter is cheap too but a gas job.

In Middle Tennessee or Louisiana?

Don't want to DIY it? Our own family of technicians will come clear that F9 for you — honest flat pricing, usually same-day, 4.5★ from 1,000+ neighbors.

🔧 Get it fixed by our techs →
FAQ

People Also Ask

What does F9 mean on an LG oven?
The oven isn't reaching temperature in time — heating too slowly or not at all. Usually a failed electric bake element or a weak gas igniter; sometimes the oven temp sensor.
How do I fix an LG F9 code?
Watch the element on bake — a good electric element glows bright red. Replace a dark/split element; on gas, replace an igniter that glows but won't light. If both look fine, test the oven temp sensor.
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