Why won't the car window roll up or down?

[ChristianFitz]

There are several reasons why a car window may not roll up or down: 1. Window lift motor damage or poor contact in the electrical control harness: If you smell burning or hear noises inside the door panel when holding down the window button for a long time, it's likely that the window lift motor components are damaged; 2. Motor overheating protection: To protect the power supply circuit, most window lift motors have an overheating protection mechanism. If components overheat for some reason, the motor will enter a protection state, resulting in window lift failure; 3. Excessive resistance in the glass guide channel: The door glass guide channel is an easily overlooked detail. During operation, dust can accumulate in the glass guide channel, increasing resistance. Over time, this may make the window difficult to raise; 4. Computer data loss: Disconnecting the battery, performing maintenance on other systems that disconnects the power or ground wire of the window control module, or starting the engine with strict power restrictions can all cause the window initialization data to be lost, resulting in the window not rolling up or down.