True or False: If the induced draft fan motor has voltage but is not running, the motor is defective.

The statement that if the induced draft fan motor has voltage but is not running, the motor is defective is true. When troubleshooting an HVAC system, the functionality of the motor can often be assessed by checking for voltage. If voltage is present at the motor terminals and the motor does not operate, it suggests that the electrical supply is reaching the motor, but the motor itself is not functioning properly.

This situation typically indicates a potential internal failure within the motor, such as a burned-out winding, a seized bearing, or another mechanical fault preventing it from turning. It's important to consider that while voltage presence rules out issues upstream of the motor, such as power supply or wiring problems, it does not confirm the motor is operational. Further diagnosis may be necessary to confirm the type of failure.

In practice, after establishing that voltage is present, a technician would often proceed to perform additional tests, such as checking the motor for continuity, inspecting for physical damage, or measuring the resistance of the windings to solidify the conclusion about the motor's condition.