What is one method for diagnosing issues with the blower motor?

Testing fuse continuity is an effective method for diagnosing issues with the blower motor because the blower motor relies on electrical power to function. If there is a problem with the power supply, such as a blown fuse, the motor will not operate. By checking for continuity in the fuse, a technician can determine whether electrical flow is interrupted. If the fuse is intact, it indicates that the circuit is complete, and further diagnosis can then focus on the motor or related components, such as the blower motor resistor or the control switch.

While listening for unusual noises might help identify a failing blower motor, it does not effectively confirm whether the motor is receiving power. Similarly, checking the air filter condition is important for airflow issues, but it does not directly relate to the motor's operation. Inspecting for refrigerant leaks pertains to the air conditioning system rather than the blower motor specifically, making it irrelevant in this context. Thus, testing the fuse for continuity provides a direct approach to assess whether electrical power is being delivered to the blower motor.