There is most likely nothing wrong with your lock over time something has caused the panel and frame to get out of whack with each other.
Sliding door lock stuck.
Step 4 finding a replacement.
If you live in a windy area place a heavy object against the door or use tape to keep it from opening up after you ve removed the lock.
This will only gum up the lock.
I ve tried locking and unlocking multiple times and the door will not move.
A door that s stuck or difficult to slide according to this old house debris build up is the main reason for a sliding door that refuses to glide.
Fix a sliding glass door that won t lock or latch easy fix.
I then tried opening sliding the door and the door will not budge.
In this video i attempt to open a patio door that has got stuck locked.
If the lock still fails to open and close smoothly and.
Here s how you can clean the rollers and the track.
Remove these two screws and gently pull out the latch mechanism and its cartridge.
To fix this remove your door from the tracks clean out the rollers and spray them with a lubricant such as wd 40.
The first step is to check the rollers.
However today when i tried unlocking my patio sliding door the unlock sound was slightly different than normal.
If playback doesn t begin shortly try restarting your device.
These may need replacing but at the very least they could probably use adjusting.
Two screws on the end of the door secure the latch.
Dirt mud hair and fur can collect along the track and in the groove which clogs the rollers underneath and prevents smooth motion.
These rollers can become damaged dirty or broken as the years go by and cause your door to stick.
The mechanics of the lock have broken leaving the top section of the door completely.
The lock in the frame seems jammed and isn t fully unlocking the door.
Do not spray any penetrating lubricant into any part of the sliding door lock if the lock continues to stick.
Most of the time the problem stems from dirty and dried up rollers.