LG Microwave Error Code C-10

C-10 is a cooking gas sensor information code. It indicates that the gas sensor's output value has gone below 5 or above 250, which is outside the acceptable operating range. When this happens, the microwave automatically cancels the cooking cycle. The issue points to a problem with the sensor itself, its connector, or the wiring connecting it to the control board.

No, you should not attempt to bypass or ignore the C-10 code and continue cooking. The microwave enters cancel mode automatically because the sensor reading is outside a safe and accurate range. Using the unit in this state means the cooking sensor is not functioning correctly, which could result in inaccurate cooking or unmonitored conditions. Address the fault before resuming use.

If only the sensor connector needs reseating or cleaning, the repair cost may be minimal, covering just a service call fee in the range of $75 to $150. If the gas sensor component itself needs replacement, parts plus labor typically bring the total into the $100 to $250 range depending on your location and the technician's rates. A main PCB replacement, if required, would be the most expensive outcome and could run $150 to $350 or more, at which point comparing the cost to a replacement microwave is worth considering.

A DIYer with some appliance repair experience can start by checking the sensor connector and wiring harness for loose connections, corrosion, or visible damage, and reseating the connector may resolve the code if that is the cause. However, working inside a microwave involves high-voltage components, particularly the capacitor, which can retain a dangerous charge even when unplugged. If you are not experienced with safely discharging microwave capacitors, it is best to have a qualified technician perform the diagnosis and repair.

A reset by unplugging the unit or cutting power may temporarily clear the code display, but the C-10 error will return as soon as a cooking cycle is attempted if the underlying sensor or connection fault has not been corrected. A reset does not repair a failed sensor or fix a loose connector. The physical cause must be diagnosed and resolved first.