Check for misaligned tracks, adjust the rollers, or tighten loose screws in the frame. If the door is warped, consider replacing it.

Tighten hinge screws first. If the door is misaligned, shim the hinges or file down the latch plate hole slightly.

Check for obstructions in the tracks, ensure the headrail is securely mounted, and examine the cords for tangles. For persistent issues, contact the manufacturer for replacement parts.