A garage door that refuses to close or reverses unexpectedly is often signaling a problem with its safety sensors, not the motor itself. These small sensors, positioned near the bottom of the tracks, use an infrared beam to detect obstructions. When they're misaligned, dirty, or wired incorrectly, the entire system can stop functioning properly, leaving your garage door stuck open or ... https://absolutegaragedoor.net/garage-door-sensor-replacement/