As a professional in the field of furnace repair and maintenance, I have witnessed the consequences of neglecting a faulty high limit switch. This seemingly small component plays a crucial role in regulating the temperature inside your furnace and preventing overheating. Not only that, but it also serves as a vital safety feature that protects your home from potential hazards. In this article, I will discuss the signs of a malfunctioning limit switch, the importance of regular maintenance, and the cost of replacement.