Built up dirt or loose debris can cause a door to stop sliding and ride off the track.
Fix sliding wooden door off track.
Reinstalling sliding bypass doors the doors are usually interchangeable but you will want to start with the rear track.
Use the blade of an old screwdriver to pry stubborn dirt loose.
Work the door slowly into the opening in this manner.
Straighten the track with a block of wood if it s bent.
Hope this video.
Use an aerosol lubricant to lubricate all the door rollers.
If one side looks lower raise it until the door looks even on the track photo 1.
Remove any remaining staples with pliers.
If you notice the track is uneven with the floor place a block of wood into the left or right side of the track parallel to the its direction.
This is a video to show you all how to repair a sliding cavity pocket door which may be stuck no rolling properly or not locking correctly.
Angle the bottom of the door toward you while you let it down and the wheels should hook right onto the track.
Moving the door when the back side is sliding on the ground is a little difficult.
If a malfunctioning sliding door is a chronic problem see if the track is dirty.
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Don t worry it ll be the only screw you see there.
To clean and lubricate the hardware of a sliding closet door use a stiff brush a toothbrush or a hand vacuum to clean dust from the tracks.
You can then fix the problem of your closet doors jumping off their track.
Sink the broken ones with a hammer.
Using a screwdriver you can just adjust the mounting screw.
Use a wire brush to clean off the dirt or debris.
If the door still sticks turn both screws a quarter turn to raise the whole door.
Try holding your foot against the bottom of the door and pull gently on the top of the door to lift the back side.
To replace torn or cracked weatherstripping where the sliding and fixed panels overlap loosen its staples with a flathead screwdriver then grab one end and pull it and the staples off the door prying gently with a putty knife.
Insert the door s wheels into the double track inside the upper door jamb lifting it as far as it will go.
Depending on your door type locate the brace that holds the wheel roller on the side that is sagging.
Bring the door to within a few inches of the strike side jamb.
If the rollers are damaged install replacement rollers available at home centers.