What type of diagnostic should be run if the induced draft fan motor shows power but is not operating?

When dealing with an induced draft fan motor that shows power but is not operational, examining the motor windings is critical. This aspect of troubleshooting allows for checking the internal components of the motor for potential electrical failures. If the windings are damaged, open, or shorted, the motor will not function even if it is receiving power. Testing the windings can reveal whether there is a continuity issue or a fault that is preventing the motor from turning.

Addressing other facets such as the control board, motor connections, and potential mechanical obstructions can be important, but they primarily focus on the supply of power and overall connectivity. While these checks can rule out issues related to control signals and external factors, understanding the condition of the motor windings provides a direct assessment of the motor's health and viability to operate. Thus, examining the windings is essential to pinpoint the root cause of the failure.