How to Repair Bifold Door Top Roller Guide If your bifold door is sticking, it's likely that they need some maintenance. They could need to be cleaned and lubricated or adjusted. The issue could be caused by loose bolts on the top pivot, or by the top guide roller. This https://bifold-door-repair56830.diowebhost.com/85554714/a-look-at-the-ugly-truth-about-bi-fold-door-repairs