LG Range Error Code C-30

C-30 means the main PCB temperature sensor has gone open circuit or the control board itself has reached an abnormally high temperature. The range triggers this code to protect its electronics from damage. It is a board-level fault that points directly to the main PCB as the affected component.

No, you should not continue using the range while C-30 is active. This fault indicates a control board issue that could affect safe operation of the appliance. Disconnect power to the unit until the repair is completed.

The cost depends primarily on the price of the replacement main PCB for your specific model, which typically ranges from around $100 to $350 or more for the part alone. If you hire a technician, labor costs will add to that total, bringing the overall repair estimate to somewhere between $200 and $500 or higher depending on your location and service rates.

The repair requires disconnecting power, removing the back cover of the range, and replacing the main PCB. A confident DIYer comfortable with appliance disassembly and handling circuit boards can perform this repair. However, if you are unsure about working inside an appliance or sourcing the correct replacement board, a qualified technician is the safer option.

A power reset may temporarily clear the display, but C-30 will return if the underlying PCB sensor fault or overheating condition has not been resolved. Because this fault originates in the control board hardware, a reset alone is not a fix and the code will reappear during normal operation.