LG Oven Error Code F-16

F-16 on an LG oven means the lower oven temperature exceeded 650°F (343°C) and stayed above that level for two continuous minutes during cooking. This indicates a loss of temperature control, most commonly caused by a relay on the relay PCB welding shut and holding the heating element on without interruption. The oven triggers this code as a protective measure to alert you that the heating circuit is not functioning safely.

No, you should not use the oven while this error is active. The F-16 code indicates that the lower oven may be losing temperature regulation, meaning the heating element could run without shutoff. Continuing to operate the oven in this condition poses a serious risk of overheating, property damage, or fire.

Repair costs depend on which component has failed. A replacement relay PCB typically ranges from around $80 to $200 or more for parts, while a temperature sensor is generally less expensive in comparison. Adding professional labor charges, a total repair can range from roughly $150 to $400 or higher depending on your location and the specific parts required.

A knowledgeable DIYer can perform the initial diagnosis by disconnecting power, removing the relay PCB harness, and using a multimeter to check each relay contact for infinite resistance. If a welded relay or faulty temperature sensor is identified, those parts can be replaced. However, working with oven electrical components carries risk, and if you are not comfortable with electrical testing or component replacement, a qualified technician is the safer option.

Disconnecting power may temporarily clear the error display, but the underlying fault will remain. If a relay is physically welded shut, restoring power will cause the same thermal runaway condition to repeat and the code will return. The root cause, typically a welded relay or failed relay PCB, must be repaired before the oven will operate safely and without the error returning.