Firstly for a whitco mk ii tasman lockthe lock needs to be in the locked position.
Remove screen door lock without key.
That is unless you have a master key system in place.
Hope you all enjoy and like comment and subscribe for more how to diy videos.
To remove a sliding screen door find the screws at the bottom corners and unscrew them with a screwdriver.
Remove this screw using a drill or screwdriver.
Unscrew this plate and remove the latch from the door if possible.
The basic pin tumbler lock should work ideally with only one key.
Pull the door up until you can see the bottom wheels on either side.
Look for a small set screw at the base of the handle.
This is a quick video to show you how to replace a sliding screen door lock.
To do this when door is open you will need to press the deadlatching pin which sits above the main latch next you will need to undo the cylinder retaining screw.
So in order to unlock a door without a key you will have to imitate the action of the key itself.
How to remove a door lock without a key.