LG Oven Error Code F12 — Oven Not Heating (Preheat Failure)
What this means
The F12 error code indicates the oven did not reach 150 degrees F within 5 minutes of starting a preheat cycle with the door closed. This means the heating element or gas igniter is not functioning. Causes include a burned-out heating element, a faulty gas igniter, a tripped thermal fuse, or a control board relay failure.
Step-by-step fix
2 stepsReset the oven
Turn off the circuit breaker for 30 seconds and restart. Try preheating to 350 degrees F.
Check the heating element (electric) or igniter (gas)
For electric ovens, visually inspect the bake element at the bottom of the oven. It should glow red when heating. Dark spots or breaks indicate failure. For gas ovens, observe the igniter when starting the oven. It should glow bright orange within 30 seconds.
When to call a professional
Replacing a heating element is a common DIY repair. Gas igniter replacement involves gas line safety and is best handled by a professional.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Bake Heating Element
Part #MEE62385001 · $30–$60
If the element has visible breaks or does not glow
Gas Igniter
Part #MEE61841401 · $25–$50
If the igniter does not glow or does not ignite gas
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