What should be checked if a blower is running over the service factor amperage draw on a motor?

When a blower is running over the service factor amperage draw on a motor, it indicates that the motor is drawing more current than it is rated for, which can lead to overheating and potential motor failure. The best course of action is to check the pulley on the motor.

The pulley affects the speed and torque of the blower fan, so if the pulley size is incorrect or if there’s an issue with the pulley alignment, it could lead to the motor working harder than it should to overcome resistance. This increased workload results in the motor drawing more current than specified. By inspecting the pulley for any discrepancies, such as being too small or misaligned, you can determine if adjustments are needed to bring the amperage draw back within the acceptable range.

Other options, while they might be relevant in some scenarios, do not directly address the immediate concern of excessive current draw in this context. Fan speed settings can influence current draw but are usually adjusted for operational requirements rather than as a direct cause of exceeding service factor amperage. Checking the capacitance value is relevant for capacitor start motors, but does not typically address mechanical load issues related to the blower performance directly. Additionally, assessing compressor performance would not be pertinent unless there’s a direct linkage to an overall system