What is one common cause of boiler failure?

One common cause of boiler failure is low water levels. In a boiler, water is crucial for absorbing heat and generating steam. When the water level drops below a safe threshold, it can lead to a condition known as "dry firing," where the boiler's heating surfaces become exposed. This exposure can cause overheating and ultimately result in damage to the boiler, such as warping or cracking of the metal. Additionally, insufficient water can prevent the boiler from operating efficiently, leading to an increase in pressure and potential safety hazards. Therefore, maintaining the correct water level is vital for the safe and efficient operation of a boiler.