Which issue pertains to the drive belt of a whole house fan?

The issue that pertains to the drive belt of a whole house fan is that it can be loose or worn. A loose or worn fan drive belt can lead to inefficient operation of the fan, causing it to not generate the necessary airflow or failing to function altogether. When the belt is compromised, it may slip during operation or not be able to transmit the motor power effectively to the fan blades, which could result in increased wear and potential damage to the motor.

Ensuring that the drive belt is in good condition is crucial for optimal performance. Regular inspections can help identify any signs of wear or looseness, allowing for timely maintenance or replacement before more serious issues arise. In contrast, problems with belt tension, material, or availability of replaceable belts are less directly related to the immediate functioning of the fan.