In a forced air electric furnace, which component is primarily responsible for preventing the unit from running without adequate airflow?

In a forced air electric furnace, the fan interlock system is critical for ensuring that the unit does not operate without sufficient airflow, which is essential for safe and efficient functioning. This component works by detecting whether the blower is operating properly. If the blower fan is not running, the fan interlock system will prevent the heating elements from being energized to avoid overheating and potential damage to the furnace.

Creating airflow is vital in a forced air system because it helps distribute the heat generated by the heating elements throughout the space. Without this airflow, the furnace could overheat, leading to failure and reducing safety. Therefore, the fan interlock system plays a protective role, ensuring that the unit operates only under safe conditions.

The thermostat, heat exchanger, and heating element all have important roles within the system, but they do not directly control airflow, nor do they provide the protective function of preventing operation without it.