What indicates a malfunction in a motor's winding?

A malfunction in a motor's winding can be indicated by an infinite resistance reading. This outcome suggests that there is a break in the winding, which means the electrical path is interrupted and the motor cannot function as intended. In a typical functioning winding, a measurable resistance is present, allowing current to flow. However, when the resistance reading is infinite, it typically indicates that there are no conductive paths, which is a clear sign of a fault such as a burnt-out winding or a disconnection.

Low resistance readings could indicate a functioning winding, albeit potentially with issues like a short circuit, while fluctuating current readings may suggest problems in the circuit or load connected to the motor rather than within the winding itself. A steady voltage reading generally indicates that the power is being supplied correctly to the motor, but it does not provide definitive information about the condition of the winding. Therefore, an infinite resistance reading is the most direct indicator of a winding malfunction.