What happens if the run capacitor across an indoor blower motor reads zero with a digital meter?

A reading of zero across a run capacitor indicates that the capacitor is faulty. In a properly functioning capacitor, you would expect to see a capacitance value that is typically in microfarads, depending on the specifications of the capacitor. A zero reading suggests that the capacitor is not able to store any charge, which is essential for the operation of the indoor blower motor.

Capacitors are vital components that help start and run the motor efficiently by providing the needed phase shift for the motor windings. A faulty capacitor can prevent the motor from starting or running properly, resulting in decreased efficiency and potential motor failure.

While issues like overload or poor connections can affect motor performance, they would not cause a capacitor to read zero in isolation. Therefore, a zero reading is a direct indication of a capacitor failure rather than a symptom of other possible issues with the motor or its connections.