If your refrigerator's light stays on even when the door is closed, your door switch might be failing. The DA34-10120E door switch ensures the light turns off when the door is shut, conserving energy and preventing overheating inside your appliance. It's a genuine part for Samsung refrigerators, maintaining original functionality. Before installation, unplug your refrigerator and protect your hands with work gloves. Verify your refrigerator's model number for compatibility before purchasing.