Agreed. I don't see how the door can slide upwards unless the upper bolts were missing, OR, if there's a tolerance issue with the amount of roller engaging in the slot. What if the edge of the bolt wasn't enough to hold the roller in place? Could be because incorrect diameter bolt was used, or width of frame was larger than expected / designed. Once they find the door they will know (obviously) whether the bolts are there (or not) and if they are of the correct size.
Last edited by RLB1; 8th Jan 2024 at 01:36.