Unclip the plastic covering the flat section and you should find 2 or 3 bolts to remove the hinge you somtimes have to loosten the bolts to adjust the hinge with the allen hex key lightly wedge the door in the centre underneath before loostening the hinges.
Removing upvc door from hinges.
If concealed fixed pin hinges.
If this isn t working try ramming the pin up with a few more taps from the hammer.
If the door is triple hinged take out the middle one first.
So the only way to get a door open when you re on the outside and it s locked from the inside is to remove the door from its hinges.
If stiff you might want to use a crow bar to lever from underside of the door.
Tapping the hinge with a hammer can loosen it up.
For the sake of stability take off the bottom hinge first followed by the top.
Don t worry removing a door from its hinges is an easy task that can be done in under a minute.