double glazed door lock?

It sounds like the centre mechanism has failed if you are not competent in this field then I suggest using a reputable lock smith or installer (TIP-always ask what the callout charge will be first!), or the door might have dropped and needs the glass re-packing (toe & heeling) which is causing the centre latch to jam.

Mike at Agree-a-price frames
September 2010

3 ways of doing this. 1 prise a chisel between the frame and door and pressure it will pulling or pushing the door it should open as the plastic should bend
2 if it does not then remove beads around panel remove panel and try again as above
3 remove hinge cover and unscrew hinges and the door will come away from frame then refit

kash
September 2010