How to Repair Bifold Door Top Roller Guide If your bifold doors have become stuck, they probably require a little attention. You may have to clean and lubricate them or adjust them. The issue could be caused by a loose bolt on the top pivot or by the top guide https://repairingbifolddoors06651.blogoxo.com/30630325/the-no-1-question-anyone-working-in-bi-fold-door-repairs-should-be-able-to-answer