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How to Fix a Bifold Doors Top Pivot Bifold doors are a great option to create a seamless transition between outdoor and indoor spaces. Like any door that is bifold, they can also have problems. Fortunately, fixing a bifold door is fairly simple and not invasive. It usually involves loosening one screw and adjusting height. Fixing the hinges Bifold doors can be an excellent way to open up a space and letting more light. They can be slid to either side, or folded back into frames.