What are the reasons why a car window cannot be rolled down?

[JudahFitz]

Reasons why a car window cannot be rolled down: 1. Insufficient oil in the door's internal window regulator. It is necessary to check the oil level in the door's internal window regulator, and if it is insufficient, the inner cover should be removed to add oil; 2. The rubber seal is prone to aging, and excessive dirt in the window gap can affect the window's movement; 3. Motor failure. The window system consists of the window, window regulator, motor, relay, and switch device. One-touch window operation, also known as one-touch power windows, refers to the function where the window automatically rolls up or down with just a press of the window control button. One-touch windows greatly facilitate the operation for passengers inside the car. Depending on the control, windows can be categorized into three types: driver-side, front-row, and full-car. The button for this function is usually marked with AUTO or the letter A on or near the window control button.