How to fix auto reverse on garage door?

To fix auto reverse on garage door that keeps reversing when trying to close or does not reverse when it should for safety, you need to adjust sensors, force settings, and travel limits that control reversal behavior. Auto reverse is a safety feature required since 1993 that makes door reverse if sensors detect obstruction or if force exceeds setting. If door reverses when closing with no obstruction, first check safety sensors near floor; clean lenses, ensure no dirt or spider webs blocking beam, and align them so sending sensor shows steady yellow and receiving shows steady green, pointing directly at each other, as misaligned sensors cause reversal and opener lights flash. If sensors aligned, check close force adjustment screw on opener motor unit; if set too sensitive, even slight friction from dirty tracks or lack of lubrication triggers reversal, so increase close force slightly per manual, one quarter turn at a time, testing after each adjustment. Check travel limit settings that tell opener how far to close; if set too far, door hits floor hard and bounces back, so adjust down limit so door touches floor without excessive pressure. Manually disconnect opener via red cord and close door by hand to feel for binding, bent tracks, or worn rollers causing friction that triggers force reversal, and lubricate rollers with silicone. If auto reverse does not work when it should for safety, decrease force setting so door reverses on slight resistance, and test by placing 2x4 board on floor, door should reverse on contact. Professional adjustment costs 75 to 150 dollars.