LG Gas Oven F9 Error Code

Before you get too involved, do some initial checks. Answers to a few questions can help you target the problem.

• Press the "CLEAR/OFF" key and try to turn your oven on again.
• If the code comes back, unplug your oven, wait 30 seconds, and turn it back on.
  • If it's not easy to get to the outlet where the oven is plugged in, you can alternatively shut off the circuit breaker that powers the outlet your oven is plugged into. If the code continues to come back, move on to the next troubleshooting steps.

NOTE: if the oven starts working again, it's very likely that the faulty component is on its way out, and you may want to keep troubleshooting to find the failing component so you can have the replacement part ready when the current part completely fails.

Make sure the gas to your oven is turned on.

• On the gas supply pipe to your oven, there will be a small valve that controls the gas.
• Make sure the handle lines up with the pipe (on), and is not turned so it is 90 degrees to the pipe (off).

If this doesn't solve the problem, make sure you turn this gas OFF before proceeding to the rest of these troubleshooting steps.

Disconnect your oven from electricity and turn off your gas valve before proceeding.

Move your oven away from the wall, remove the back panel by taking out all visible screws with proper screw driver, and visually inspect all wires and circuit boards.

Damaged wires could be cut, chewed, scorched, or torn. Damaged circuit boards could be melted or discolored. In either situation, you're looking for parts that don't look like everything else. If everything passes the visual check, move on to checking if the igniter is your issue.

A common problem associated with this error code is that the igniter in the oven is going out. When the igniter is working properly, you turn your oven on and the igniter will begin to warm. After it is fully heated, it will automatically release gas and the igniter will ignite resulting in flames.

If the igniter is going out or completely broken, it will never warm enough to trigger the gas, and subsequently, the flames.

If you think the igniter is the problem, visually inspect if for any cracks. If it's cracked, replace it.

If there are no cracks and you have a multimeter, use that to see to see if it's functioning correctly. If you don't have one, check one out from your local library or buy one from a reliable source.

Different igniters will have different ranges, but they all fall within similar parameters. You're looking for between 40Ω~2,000Ω.

These are the two igniters that are likely on the back of your oven.

In the case of this broken igniter, the multimeter displayed 1.

If you find that your igniter is broken, it will need to be replaced.

Check pins 4 and 5 of CN31 in main PCB with a multimeter. Normal resistance is approximately 1.09kΩ at 25˚C.