LG Oven Error Code C-30

C-30 on an LG oven indicates a problem with the PCB temperature sensor on the main control board. The sensor is either reading as an open circuit, meaning it has lost continuity, or it is detecting that the PCB temperature has risen to an abnormally high level. In either case, the oven stops normal operation to prevent further damage. Resolving this fault requires replacing the main PCB.

No, you should not continue operating the oven while C-30 is active. The error indicates either a non-functional PCB temperature sensor or actual overheating of the control board. Running the oven under these conditions could cause further damage to the control electronics or create a safety risk. Disconnect power and have the unit serviced before using it again.

The main cost involved is the replacement main PCB, with parts typically ranging from $150 to $400 depending on the specific LG oven model. If a professional technician performs the repair, labor costs will add to the total, generally bringing the full repair cost to a range of $250 to $600 or more. Obtaining a parts quote for your specific model number before committing to the repair is recommended, especially on older units where the repair cost may approach replacement value.

The repair requires disconnecting power, removing the back cover, and replacing the main PCB. A technician with basic appliance repair experience can perform this task, but it does involve working inside the oven's electrical enclosure. Always disconnect power completely before opening the unit. If you are not comfortable working with appliance electronics, a qualified technician should handle the repair.

Disconnecting power and restoring it may temporarily clear the displayed code, but C-30 will return if the underlying issue with the PCB temperature sensor has not been resolved. A simple reset does not repair an open sensor circuit or address board overheating. The fault will reappear once the oven resumes operation and the control system re-checks the sensor status.