Just lately, my drivers window is behaving differently.

When I wind the window up, once it gets to the top, it doesn't stop, it then continues back down until it is half open.

I don't recall it always happening?

Can I rectify this odd behaviour myself or is it a dealer fix?

Try winding window fully down keeping switch pushed till it you hear a click, then fully up keeping switch operated till window is fully up and click is heard again.

Brilliant, worked perfectly, thank you.