Pry off or unscrew the covers and then adjust the rollers using a screwdriver so that they move away from the door.
How to fix a sliding glass door that sticks.
With the screws brackets removed pull the fixed glass panel from the side of the frame towards the middle of the door lift and swing the bottom out of the frame and then remove the whole door panel.
Sliding doors move along the tracks using a set of rollers.
To do this lift and swing the bottom out towards the outside and then remove it.
To fix this remove your door from the tracks clean out the rollers and spray them with a lubricant such as wd 40.
Use hot soapy water and a brush to clean the tracks.
Standing inside the house with the door in the middle of the opening have your helper on the opposite side slowly tilt the top of the door toward you.
There are dozens of rollers available and your goal should be to get the right roller for your door.
This will allow you room to remove the door.
And good luck with your project.
Inspect the rollers and replace them if damaged.
These rollers can become damaged dirty or broken as the years go by and cause your door to stick.
Glass shops that do residential work should be quite familiar with patio door repairs and replacements.
If the edge of the door is hitting the frame try tightening the screws on the top middle or bottom hinge on both the door frame and the door being careful not to over tighten and strip the screws.
Reinstall the doors and adjust the rollers to the correct height.
Determine exactly where the door is sticking before deciding on a remedy.
Lastly remove the sliding glass door panel.