Give it a good oiling then replace it and see.
How to take a upvc door off its hinges.
Continue to tap it up gradually increasing the force until the pin is finally lodged upwards.
Put the flat end of the nail against the pin and tap it up with the hammer.
Taking a hammer and your nail punch gently ram the pin upwards.
Unscrew the screws holding the bottom hinge to the door frame using a phillips screwdriver.
Hi most upvc doors work on a system that allows the door to be lifted off the hinges.
Place the key in the lock and turn it either to 5 to or 5 past the hour position hold it there gently pulling the barrel out.
Prize off the hinge covers and you will see a number of fixings just take them all out until the door drops off or the hinges that are on the door frame may be best take off the covers and see you might need an allen key.
Have a look at the top of each hinge to see if there s a domed normally brass pin.
Found a website that say how to take out the cylinder which might be the cause in your case remove the screw on the edge of the door inline with the bottom of the lock.
Force the pin up from the door hinge.
Which will need replacing with some larger threaded ones normally 4 8mm.
If so get a flat head screw driver and pop the pin out you may have to take all the hinge pins out and remove the sash before you can get to the screws.
To refit the door it s just the reverse of this.
Spring loaded hinges are always spread out like a butterfly and mounted flat on the outer frame.
A video tutorial on how to remove a butt hinge pin from a upvc door.
Butt door hinges can be purchased from upvc spares 4 repairs here.
With the door in a 90 degree opened angle you should use something to lever the door up approx 50mm this will lift it from the hinge pin.
Open the door to carefully remove it.
Good to have an extra pair of hands as the doors can be heavy if there is glass in them.