Industrial Maintenance Technician Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

In this scenario, the correct answer encompasses all potential causes for a furnace blower that turns off and on frequently while still providing heat. Each of the situations outlined can contribute to the described issue.

A tripped breaker can interrupt the electrical supply to certain components, leading to erratic blower operation. If the breaker is not fully providing power, you may experience on-and-off cycling as the system attempts to function.

A defective contactor or relay can cause a failure in the control signals necessary for consistent operation of the blower. If these components fail, it might intermittently cut power to the blower motor, resulting in frequent cycling while still allowing the furnace to supply heat intermittently.

A defective motor, specifically one with an open circuit, can prevent the blower from running continuously. This might manifest as the blower cycling on briefly when called for and then shutting off if the motor cannot maintain operation.

Given that any of these scenarios can independently affect the blower's functionality in the described manner, the option indicating that any of these possibilities should be suspected is entirely valid.