While you wait for answers, we may have found some information which could help you.
Click here for Pvc Its FrameVelux KEM 140 skylight elec. opener only workd intermittent?
Remove cover plate on patio door?
Can you open a double glazed upvc window?
How can I mend the broken cord on my velux skylight?
2001 megane dynamic passenger door locked shut ?
Hinge creaks on compositie exterior door?