The Samsung CE137NTM Oven has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your Samsung might be giving you.
The 'E - 24' message indicates that the microwave oven is in a state of potential overheating.
The 'L' indicator is displayed when the oven is locked as a result of pressing the Clock and Fast Preheat buttons simultaneously for about three seconds.
The oven does not beep to indicate the end of a function when the Start and Clock buttons are pressed simultaneously for about one second.
If interference is detected by the oven’s microprocessor, the display may be reset.