LG Microwave Error Code C-1

C-1 is an informational code indicating that the gas cooking sensor has produced a reading below or above its acceptable threshold. When this happens, the microwave automatically switches to cancel mode and stops the cooking cycle. The code points to a problem with the sensor itself, its wiring, or the connector between the sensor housing and the control board.

The C-1 code causes the microwave to enter cancel mode, so automatic sensor-based cooking functions will not complete. Manual timed cooking may still operate, but the underlying sensor fault means the auto-cook feature cannot be trusted. It is best to resolve the fault before relying on the appliance for normal use.

If the fix is simply reseating or cleaning a connector, there may be no parts cost, and a service call would typically run in the range of $75 to $150 for labor. If the gas sensor element needs replacement, parts plus labor generally falls in the range of $100 to $250 depending on the model and local labor rates. If the control board is found to be at fault, repair costs can be higher, and replacement of the board may approach or exceed the value of an older unit.

Some causes of C-1 can be addressed without replacing parts. Start by unplugging the microwave and checking that the sensor housing connector is fully seated and free of corrosion at the PCB. If the connection looks secure and clean but the code returns, the sensor element itself likely needs replacement, which requires disassembling the unit and working near high-voltage components. If you are not comfortable with appliance disassembly, a qualified technician should perform the repair.

Unplugging the microwave for a few minutes may temporarily clear the display, but if the gas sensor or its connections are faulty, the C-1 code will return as soon as a sensor-dependent cooking function is attempted. A reset does not repair the underlying hardware issue, so the sensor and wiring must be inspected and corrected for the code to stay cleared.