Always try and replace your old gearbox with the exact same size and brand.
How to change a cylinder lock on a upvc door.
All you need to replace your old upvc mechanism with a new central gearbox is a screw driver or drill and a spare 5 minutes.
That s it the cylinder should be out of the door and you can measure it to see which size you need.
Then insert the key into the lock and turn it about 10 degrees to line up the inner latch of the lock with the body of the lock.
To measure the lock open your door and unscrew the retaining bolt on the side of the door.
If it s hard to remove from the door try spraying a little wd 40 around the cylinder.
How to remove lock from upvc door.
Replacing a multipoint upvc door lock may seem like a daunting task but with the right tools and know how it is relatively simple.
How to change a upvc door lock.
This is the large screw that is in line with the cylinder.
Next once the cylinder is loose pull it out of the socket it s in and take the key out.