In addition to cleaning and lubricating sliding door tracks you want to lubricate the door lock.
Sliding door lock stuck closed.
If possible post a photo of the lock.
Passenger sliding door is stuck in lock position and won t open 2 years ago i replaced the lock actuator i pulled the inside trim off and with some force was able to unlock the door.
The pictures look like to me that the door slid past the stops.
Power door works fine now.
In this video i attempt to open a patio door that has got stuck locked.
The mechanics of the lock have broken leaving the top section of the door completely.
In order for smooth and easy operation there is some slack that can potentially cause your door to come off the track.
Went back and forth with the assembly lock and unlock worked smoothly.
Your sliding door operates on a track to open and close.
Open close lock unlock then 2 days later it did it again.
Sometimes the set screw holds a cover plate on take the cover plate off and then you can get at the screws underneath the cover plate.
Difficult to advise you on how to handle the lock without seeing it.
Sometimes patio doors become hard to open even when the track is clean.
If you can t budge it at all it most likely is the lock.