The wheels on the glass sliding patio door have an adjustment screw at the bot.
How to adjust sliding door lock.
In addition to cleaning and lubricating sliding door tracks you want to lubricate the door lock.
The best way to lubricate any lock is to disassemble it and use an aerosol lubricant to flush away grime and coat the moving parts of the lock.
On my door the holes had plastic plugs in them.
How to fix a glass sliding patio door that dosnt roll close or lock properly.
There are holes on your sliding glass door that conceal the adjusting screws to these rollers.
If you find that the engagement tongue is going above or below the logo you will have to adjust the lock.
How to adjust sliding glass door rollers for a smoother ride.
Download instructions for more information.
Sometimes patio doors become hard to open even when the track is clean.
The lock will not engage if the engagement tongue goes above or below the logo.
Inside a standard sliding glass door there are adjustable rollers that help it slide back and forth on the track.