How To Adjust Liftmaster Garage Door Sensors

Lay a level so the bottom runs along the string.

How to adjust liftmaster garage door sensors. Adjust the garage door opener mechanism. Try adjusting the unlit sensor by manipulating it slightly with your hand. Loosen one of them and adjust it until the light shines steadily. If the light comes back on the door should work properly again.

Now press the remote control. If the line of the string isn t level adjust 1 or both garage door sensors by sliding the mounting bracket upward. This video will show you how to align the safety reversing sensors on your garage door opener. Look also for cobwebs on the door tracks because they could also be blocking the light.

To reconnect the garage door to your liftmaster garage door opener manually close the garage door pull the emergency release handle down. This video demonstrates how to adjust force on a liftmaster garage door opener with manual adjustment controls. Check the sensors to see if they are dirty. Check that the line of the string is level.

If you see a blinking light on one of the sensors it means they aren t aligned. Try opening the garage door with the remote and see what happens. This will cause the trolley to move into position and reconnect to the garage door. In this video i show you how to realign your garage door sensors so that the garage door can function properly.

On the garage door motor there will be two knobs or dials to adjust the opener and the reverse sensor. Refer to the owner s manual to determine which is. Another reason for the sensors to misalign is that the door track is loose.