LG Microwave Error Code E-23

E-23 on an LG microwave indicates a preheating maximum time error. It means the oven cavity did not reach the preset target temperature within 30 minutes during a preheat cycle. When this time limit is exceeded, the microwave automatically cancels the operation and displays E-23. The most likely causes are a faulty temperature sensor or a failing heating element.

Unplugging the microwave and plugging it back in may temporarily clear the E-23 display, but the error will return if the underlying problem has not been fixed. The fault is triggered by a real performance failure, specifically the inability to reach temperature within 30 minutes, so clearing the code without repairing the sensor or heater will not resolve the issue.

Repair costs depend on which component has failed. A replacement temperature sensor typically costs between 15 and 50 dollars for the part, while a heating element can range from 30 to 100 dollars or more depending on the model. Adding professional labor, total repair costs generally fall somewhere between 80 and 250 dollars. If the control board is the root cause, costs can be higher, which may make replacement worth considering for older units.

Some aspects of diagnosing E-23 are DIY-friendly, such as inspecting wiring connections for corrosion or looseness. However, testing and replacing the temperature sensor or heating element requires working near high-voltage components inside the microwave, which carries serious safety risks. If you are not experienced with appliance repair and high-voltage circuits, it is strongly recommended to have a qualified technician perform the repair.

When E-23 is triggered, the microwave automatically converts to cancel mode, which means it stops the cooking operation on its own. You should not attempt to bypass this fault and continue using the appliance for preheating functions until the sensor and heater have been properly inspected and repaired. Using a microwave with a faulty heating system could lead to uneven cooking results or further component damage.