Passenger side window not closing


Hi all,

My A2 , over the last few days, has developed a fault with the passenger side front electric window. The window doesnt close, but rather when it gets to the top it moves down again (so its about 4 inches open) i am able to nudge it up by short pressing the 'up' button but as soon as it goes to the top it moves down. Its acting as though there is an obstacle.

Whats the likely cause?
a faulty sensor, a mechanical issue, the hot weather effecting something (its been touching 30deg since monday when i first noticed it)?

any help would be gratefully appreciated.


Something is activating the anti-trap system on the window.
As @depronman has said, silicon lube the window runners and run the window up and down a few times

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