LG Range Error Code F7

F7 on an LG range indicates a main oven no-heating error. The control board detected that the oven temperature did not rise above 150°F and did not exceed the starting temperature over a 5-minute preheat window with the door closed. This points to a failure in the bake element, broil element, temperature sensor, or control board. The error does not apply to Proof or Cook and Warm modes.

No, you should not attempt to use the oven while F7 is active. The error means the oven cannot heat properly, and continued use without resolving the underlying fault could pose a safety risk or cause additional damage to the appliance. Disconnect power and perform diagnostics before resuming use.

Unplugging the range or disconnecting power will temporarily clear the F7 code from the display, but the error will return as soon as the oven attempts to preheat again if the underlying problem has not been fixed. A reset alone does not resolve the heating fault. The defective component, whether it is a heating element, sensor, or control board, must be identified and repaired or replaced before the oven will function normally.

A knowledgeable DIYer can diagnose F7 by unplugging the range, removing the back panel, and testing the bake heater, broil heater, and temperature sensor for continuity and proper resistance with a multimeter. Replacing a burned-out heating element is a common DIY repair. However, if the control board is found to be faulty, board replacement is more involved and some homeowners prefer to have a technician handle that portion of the repair.

Repair costs depend on which component has failed. A replacement bake or broil heating element typically costs somewhere in the range of $20 to $80 for the part, while a new control board can range from $100 to $300 or more depending on the model. If you hire a technician, add labor costs on top of the part price, which can bring the total repair into the $150 to $500 range depending on the fault.