What is the reason why the right rear window can only go up but not down?

[Dora]

There are several reasons why a car window cannot be raised or lowered: one is the aging and deformation of the glass sealing strip, which requires replacement of a new seal or application of talcum powder for lubrication if not severe; another is dirt or foreign objects in the window lifting guide rail, necessitating cleaning and application of grease; and another could be motor failure or low battery power, requiring charging or motor replacement. Additional information is as follows: 1. Introduction: The production of automotive glass involves heating the glass to near softening temperature in a furnace, then quickly transferring it to air grids with varying cooling intensities for uneven cooling, creating different stresses between the main viewing area and the peripheral area. Generally, this process produces zone-tempered glass. 2. Classification: Automotive glass mainly falls into three categories: laminated glass, tempered glass, and zone-tempered glass, all capable of withstanding strong impacts. Automotive glass is also classified by location into four types: windshield, side window glass, rear windshield, and sunroof glass.