Which component in electric boilers is crucial for preventing overheating?

In electric boilers, the water level controller plays a crucial role in preventing overheating. This component monitors the water level within the boiler and ensures that it remains within safe operational limits. If the water level drops too low, it can lead to overheating as the heating elements continue to operate without sufficient water to absorb the heat being produced.

When the water level controller detects low water conditions, it can either shut off the heating elements or trigger a warning, thereby preventing the potential for damage due to overheating. Maintaining an adequate water level is vital for the safe and efficient functioning of the boiler, ensuring that the heated water can be used to transfer heat appropriately without risking the integrity of the boiler system.

In comparison, while other components such as thermocouples and circuit breakers also play important roles in monitoring and protecting the system, they do not directly manage the water level itself. Instead, thermocouples measure the temperature, and circuit breakers protect the electrical circuit from overloads or faults. Thus, the water level controller is specifically essential for managing conditions that could lead to overheating in electric boilers.