Or it could happen by an improperly placed box that falls and hits one of the units. You might be working in the garage, and you, or someone else, inadvertently bumps one unit. Often it happens without us realizing it. What can cause the photo eyes to become misaligned? How sensitive is it? If you place a piece of wood, for instance a 2X4, flat on the ground under the door, as soon as the door hits the board, it must go back up. How does it work? Again, while the door is descending, if a person or object in the path of the door is hit by the bottom section, and if the detection system is properly adjusted, the door must reverse direction.
You should also be aware that there is a second automatic reverse system to protect you and the members of your family. If for any reason the beam is interrupted while the door is closing, the door must reverse direction and open automatically, after only one section of the door has passed through the door frame. One of the units serves as the transmitter and the other has a mirror that reflects the signal beam. You can think of the process like the automatic opening and closing of the sliding doors at your local supermarket.īetween the two units there is an invisible beam that crosses the width of the opening. These two units are directly connected electrically to the opener motor. This reversal system uses photo eye sensors placed in two small units, each installed about 6 inches (15 cm) from the ground on the tracks on each side of the door. This was done in response to the high number of unfortunate accidents caused by people, especially children, being hit by a lowering door. To start with, you should know that all electric garage door openers sold in North American since 1993 must come equipped with an automatic reverse system. If you would like to know what to do in case this problem presents itself one day, read on. You seem to remember that the same thing happened to your neighbor, but you never learned how he solved the problem. Right away, be assured that this is not a serious problem and you can resolve it fairly quickly by yourself. You close the door by again pressing the remote, but after barely starting to lower, it suddenly reverses direction and goes back up! At this point, everything is working smoothly, as it should. You’re getting home from work and press the remote to open the garage door. It may surprise you that the problem behind the largest number of service calls to garage door specialists is not with the door itself, but rather with the automatic reverse mechanism, more exactly the misalignment of the photo eyes.
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