Garage doors may display a variety of symptoms if sensors need attention.
Garage door pressure sensor.
Safety sensors are critical components of most automatic garage doors.
On the garage door motor there will be two knobs or dials to adjust the opener and the reverse sensor.
The sensors detect obstructions in the path of a closing garage door and prevent the door from closing when the path isn t.
These sensors are not door openers or closers though.
Pressure sensors attach to the bottom of the garage door.
Garage door openers manufactured after 1993 include sensors to prevent a door from closing on a child or pet.
If you garage door is lowering then reversing back to the open position there could.
Again if someone or something contacts the sensor the door stops closing and pulls away.
Sensing edges provide entrapment protection for motor operated doors by offering an auto reverse or auto stop feature.
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.
The bottom sensing edge stops and reverses the door upon contact with an obstruction.
If any object blocks the path of the infrared sensors the garage door opener will not activate or will reverse if operating.