How to fix garage door auto reverse?

To fix garage door auto reverse that is causing door to reverse when closing with no obstruction, or not reversing when it should for safety, you need to address sensors, force settings, and travel limits that control auto reverse function. Auto reverse is a mandatory safety feature since 1993 that uses safety sensors near floor and force sensing to prevent door from closing on objects. If door reverses unnecessarily when closing, first check safety sensors mounted 4 to 6 inches above floor; clean lenses with soft cloth to remove dirt and spider webs, ensure brackets tight, and align sensors so sending sensor shows steady yellow and receiving shows steady green, pointing directly at each other at same height, as misalignment causes opener lights to flash and door to reverse. If sensors aligned but door still reverses, check close force adjustment screw on opener motor unit; if force set too sensitive, friction from dirty tracks, worn rollers, or lack of lubrication triggers reversal, so increase close force slightly one quarter turn and test, and lubricate rollers with silicone lubricant twice yearly. Check down travel limit so door touches floor without excessive pressure, as hitting floor too hard causes bounce back. Disconnect opener via emergency release and manually close door to feel for binding from bent track or broken spring. If auto reverse does not reverse when it should, decrease force so door reverses on slight resistance and test with 2x4 board on floor, door should reverse on contact per safety. Professional fix costs 75 to 150 dollars.