F6 error on a gas LG range: A troubleshooting guide

Is your gas LG range displaying an F6 error code? Don’t worry — this is a problem that you can fix yourself, and we’re here to help you do it!

If you find out that you need any replacement parts for your LG range while you’re troubleshooting, you can enter your model number at AppliancePartsPros.com to order them. Most orders arrive in just two business days, and we have thousands of free guides to show you how to install your new parts.

Important: The error code information provided in this article may not apply to your specific appliance model. The disassembly information is based on models starting with LRG309. While we strive to offer helpful advice for DIY appliance repairs, variations in models and configurations can lead to differences in troubleshooting steps, error codes, and part replacements. For the most accurate guidance, we strongly recommend consulting the technical sheet for your specific appliance model.

What does the F6 error code mean?

The F6 error code usually means that the oven temperature is above 650°F continuously for more than 2 minutes during baking or broiling. This doesn’t include self-cleaning cycles, which can reach higher temperatures.

This error code is the range’s way of signaling a potential safety issue related to the oven’s temperature sensor. Sustained oven temperatures over 650°F can be hazardous and may also damage internal parts.

What you need

• Phillips screwdriver
• Multimeter

Important: The specific tools required may vary depending on the model of your appliance and the type of fasteners used on it. Always consult the user manual or refer to any specific instructions provided by the manufacturer for the recommended tools for your appliance model.

Read more: Gas Range Smells Like Gas: Top 5 Reasons and Fixes

Safety precautions

When working on any appliance, remember to keep safety first. Here are some tips to keep in mind:

• Always power off and unplug your appliance or switch off the circuit breaker before you attempt any maintenance or replacement work. This keeps you safe by eliminating any risk of electric shock.
• If the appliance has recently been used, give it plenty of time to cool down before working on it.
• Shut off the gas supply to prevent any gas leaks while you work.
• Take your time while working to prevent accidents and personal injuries. Rushing is the enemy of precision.
• Work in a well-lit area so you can see and access appliance parts.
• Keep your workspace free of clutter and other obstacles. Keep children and pets away from the work area.
• Never work on internal parts with wet hands. Make sure the work area is completely dry.
• Check the user manual to see if there are specific installation or safety instructions related to your appliance or replacement part.
• Be gentle when handling or removing parts. Excessive force might damage the appliance or cause personal injury.
• Wear insulated work gloves to protect your hands from sharp metal parts and debris.
• When working with wires, avoid touching any exposed wires or terminals. If you need to touch a wire, use a non-conductive tool or wear insulating gloves to prevent electrical shock.
• Always take photos or make a note of wiring terminals or other connections before disconnecting them to make reassembly easier.
• Don’t test live voltage with a multimeter if you’re unfamiliar with how to prevent short-circuiting.

Read more: Gas VS Electric: Which Range Is Right For You?

How to troubleshoot the F6 error code

Follow these steps to clear the F6 error code from your gas LG range.

Step 1: Access the main control board

1. Unplug the range from the power supply.
2. Shut off the gas supply to the range.
3. Pull the range away from the wall so you can access the rear panel.
4. Remove the two wire covers by taking out the screws.
5. Remove the 3 screws from the rear control cover and take off the cover.
6. Remove the 16 screws from the rear back cover and take off the cover.

Step 2: Check the wiring

1. Make sure the range is unplugged from the power outlet.
2. Check for any loose wiring connections. Reseat any loose connections you find.
3. Check the wiring for any burn spots, frays or other damage. If the wiring is damaged, you’ll need to replace it.
4. Set a multimeter to continuity mode.
5. Use the multimeter probes to check the wiring for continuity. If there’s no continuity, replace it.

Step 3: Test the temperature sensor

1. Make sure the range is unplugged from the power outlet.
2. Find the CN05 wiring connector on the main control board.
3. Set a multimeter to resistance mode (Ω).
4. Use the multimeter probes to measure the resistance between pins 1 and 2 of the CN05 connector on the control board. The resistance should be approximately 1.09kΩ at 77°F.

NOTE: Generally, for every 1 degree in temperature difference, 2 Ohms could be added or subtracted. If the temperature in your home is cooler, resistance would be subtracted. 

If the resistance isn’t within the normal range, then the oven sensor needs to be replaced.

If the resistance is within range, then you’ll need to replace the relay control board.

How to replace the temperature sensor (if necessary)

1. Disconnect the power and gas supply to the range.
2. Open the oven door and remove the racks.
3. Find the oven sensor on the back wall of the oven cavity.
4. Remove the 2 mounting screws for the sensor.
5. Disconnect the sensor by pulling the wire towards the oven cavity.
6. Remove the oven sensor.
7. Install the new oven sensor by reattaching the wiring harness and mounting screws.

Read more: 6 tips to safely cook with a gas range  

More information

Thank you for reading! We hope this guide helped you get your gas LG range working again.

If you have any other appliance repair needs or projects, don’t hesitate to explore our other troubleshooting guides and videos.

If you need replacement parts or some extra help with ordering them, grab your model number and head over to AppliancePartsPros.com, where you can chat with a pro, read our DIY blog and more.

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