How To Align Garage Door Sensors Liftmaster. On most brands of garage door sensors, the led light on each sensor will not light up unless the sensors are aligned. Ad shop our wide selection of batteries, bulbs, chargers & device repair services!
Loosen the wing nut on the front of the sensor, align the sensor so their lenses are pointing at each other. On either side of the track, near the floor, you'll find a pair of led safety sensors that stop the door from moving when something is in the door opening. Lay a level so the bottom runs along the string.
Locate both safety reversing sensors, they are located on each side of the garage door, fastened to the door tracks, no higher than 6 inches above the garage floor.
If the line of the string isn't level, adjust 1 or both garage door sensors by sliding the mounting bracket upward. Get on a ladder and check the wiring from the safety reversing sensors to the garage door opener. When you inspect your garage door sensors you’ll notice each. The best way to do this is to trip the fuse to your garage in the breaker box.