I don't know if the wiring on the button is loose or not but it opens fine but when I close it, it moves in intervals very slowly

 

The motor might be weak.

 

Either the motor is weak as tech said, or it is possible that the rubber strip as the base of the window has shrunk and is pinching the window. I have seen that happen before. You could try lubing the rubber strip with some silicone (Or liquid dish soap in a pinch) to see if it helps at all

 

FYR.


JPN

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