Option: Reduce the “Up Limit” by turning the adjustment screw clockwise till the door opens just enough to allow your car to go without the need of hitting the bolt or straining the opener. Change the sensitivity settings utilizing the controls around the motor unit as outlined from the manual. https://download-free-software-2078652.ttblogs.com/18119229/5-tips-about-chamberlain-screw-drive-limit-screw-you-can-use-today