Troubleshooting the F1 Error Code on Your LG Gas Range: A Step-by-Step Guide

If your gas LG range is displaying an F1 error code, there’s no need to panic or consider replacing your appliance just yet. This issue is often related to the oven temperature sensor and can typically be resolved with some basic troubleshooting.

What Does the F1 Error Code Mean?

The F1 error on an LG gas range generally points to a problem with the oven temperature sensor. This sensor is responsible for monitoring the oven’s internal temperature and sending this information to the control board. If the sensor is faulty or its connection is compromised, the range may display an F1 error code.

What You’ll Need for the Repair

• Phillips screwdriver
• Multimeter

Safety First

Before you start, it’s essential to prioritize safety. Use the following guidelines to ensure a safe repair process:

• Disconnect Power and Gas: Unplug the range or switch off the circuit breaker, and shut off the gas supply to prevent electrical shock and gas leaks.
• Allow Cooling Time: Make sure the appliance is completely cool before working on it, especially if it has been recently used.
• Keep the Area Safe: Work in a well-lit, clutter-free space. Keep children and pets away from the work area to avoid accidents.
• Dry Hands and Workspace: Ensure your hands and the workspace are dry to minimize the risk of electrical shock.
• Handle Parts Gently: Avoid applying excessive force to components, as this can lead to damage or personal injury.
• Use Insulated Gloves: Wear gloves to protect your hands from sharp edges and debris inside the appliance.
• Note Connections: Take photos or notes of wire connections and components before disconnecting anything to simplify reassembly.
• Avoid Live Voltage Testing: If you need to use a multimeter, only test live wires if you are confident in safely handling electrical equipment.
• Consult the Manual: Refer to the user manual for your specific LG range to verify any additional instructions or warnings.

How to Fix an F1 Error Code on an LG Gas Range

Step 1: Access the Main Control Board

1. Unplug the range from the power outlet.
2. Shut off the gas supply to the range.
3. Pull the range away from the wall to access the rear panel.
4. Remove the two wire covers by unscrewing them.
5. Remove the three screws holding the rear control cover and take off the cover.
6. Remove the 16 screws securing the rear back cover and take it off.
7. Inspect the wiring connections on the main control board for looseness or damage.
8. Reseat any loose wiring connections securely.
9. Replace the wiring harness if it is damaged.

Step 2: Test the Oven Temperature Sensor

1. Locate the CN05 wiring connector on the main control board.
2. Set a multimeter to resistance mode (Ω).
3. Measure the resistance between pins 1 and 2 of the CN05 connector using the multimeter probes.
4. Check the resistance reading; it should be approximately 1.09kΩ at 77°F.
5. Adjust for temperature variations by adding or subtracting 2 Ohms per degree from the baseline reading.
6. Replace the oven temperature sensor if the resistance is not within the expected range.
7. Replace the main control board if the resistance is normal but the F1 error persists.

Step 3: Replace the Oven Temperature Sensor (if needed)

1. Confirm the range is disconnected from the power supply and the gas supply is off.
2. Open the oven door and remove the oven racks.
3. Locate the oven sensor on the back wall of the oven interior.
4. Unscrew the two mounting screws holding the sensor in place.
5. Disconnect the sensor by pulling its wiring through the oven cavity.
6. Install the new sensor by reattaching the wiring harness and securing it with the mounting screws.

Also Read: Resolve an F1 error on a gas GE range with this troubleshooting guide

Preventing Future F1 Errors

Regular maintenance can reduce the likelihood of encountering an F1 error code. Here’s how you can keep your LG gas range running smoothly:

1. Remove grease and food residue from the oven interior to prevent buildup that can interfere with the sensor or other components.
2. Check the sensor wiring and control board connections every few months to ensure they’re secure and free from damage.
3. Heavy or improperly placed items can block airflow, causing temperature regulation issues. Make sure there’s sufficient space around dishes for heat to circulate.
4. Electrical surges can damage the control board and other electronic components. Using a surge protector can safeguard your range from unexpected voltage spikes.
5. Always refer to the user manual for guidelines on using, cleaning, and maintaining your appliance. These recommendations are tailored to your specific model.

Conclusion

To wrap things up, troubleshooting the F1 error code on your LG gas range doesn’t have to be a daunting task. With a little patience and the right tools, you can often pinpoint the problem and get your oven back in working order without calling a technician. Remember to always prioritize safety and double-check your work.

Taking care of your range with regular cleaning and maintenance can go a long way in preventing future issues. And, if you’re ever unsure or something feels out of your depth, don’t hesitate to reach out to a professional for help.