The second line of defense is a set of infrared sensors which should be mounted 4 to 6 above the floor on each side of the garage door frame.
Garage door sensors should be tested.
Garage doors may display a variety of symptoms if sensors need attention.
The latest garage door sensors are technologically advanced and even allow you to control the opening and closing through an app on your smartphone.
In this case check the alignment of the opener or better involve a technician.
Here s what liftmaster suggests.
Check the sensors leds.
If the sensors are working the garage door should immediately stop closing and return to the open position.
If the garage door fails to stop and crushes the box check the sensor alignment.
Garage door sensors should be tested.
If any object blocks the path of the infrared sensors the garage door opener will not activate or will reverse if operating.
If your garage door sensors are clean it could be the alignment or the wiring.
Sometimes the sensor may be beyond repair due to wear and tear and in such a case your best bet is to replace the garage door sensor with a new one.
However if the door goes back to the open position then the sensors are working as they should.
3776611 could someone help me please select the correct text in the passage.
Verify the wire connections are correct on the garage door opener.
Check for incorrect wiring between the sensors and the garage door opener.