What would cause an electric side window to lower normally but rise slowly?

When an electric side window lowers normally but rises slowly, it typically indicates that the motor is struggling to operate efficiently in one direction. A worn motor may have degraded internal components or decreased magnetism, which can impede its performance, particularly when it is tasked with lifting the window against the weight of gravity.

In this situation, the motor may generate enough power to lower the window due to the support of gravity but lacks the strength or speed required to raise it back up effectively. As a result, the window rises slowly. The window track condition, electrical issues, or system electrical components may not directly cause this specific problem if the lowering function operates correctly.