Locate the cylinder retaining screw using the cylinder as a guide and remove screw.
How to change a upvc door lock barrel.
Slightly loosen the door handle fixing.
Slacken the handle screws.
Put the key in the door barrel from the inside.
How to change a upvc door lock.
There are several types of cylinder locks.
Test the lock by turning the key both right and left a few times and gently tug on the key when it is turned to both.
This will become more obvious as you turn the key as the euro cylinder will suddenly lunge towards you.
The one presented here is a.
Only remove the key from the lock once the retaining screw is secured back into place.