Garage doors have two main types of springs. Extension springs run above the horizontal tracks on either side of your garage. They get their power by extending. Torsion springs go along a bar you can see above your garage door when it is closed. Torsion springs obtain their force from twisting.
The failure of either one of the two springs on your garage door can most likely keep you from being able to open your garage door.
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Regrettably for a lot of home owners, if one of your springs is broken, there’s not much to do except to call a garage door replacement company and have them come out and change the springs.
But this is an item you can and should fix for yourself. When you’ve got an opener, you also have some sort of interrupter tool that retains the door from closing if its path is blocked.
By far the most common sensor that stops and reverses your garage door is a set of "eyes" that are found toward the bottom of your garage door’s track on either side of the door.
Does your garage go down, then back up for no noticeable reason? If you have carefully looked for for something blocking of the door and can’t see anything, you may have bumped your stop/reverse lights out of alignment.
The main cause that your door will stop and reverse is that your "eyes" are functioning precisely as they are supposed to. There is something blocking your garage door. Sometimes the object that is blocking the door is not clear, so vigilantly look around your garage door opening. Ultimately you’ll figure out what it is.
If you’ve looked high and low for the article blocking your garage door to the point that you have become frustrated, it may be that nothing is blocking it. Sometimes a fleck of dust, an insect or condensation has gotten on the lenses of your stop/reverse lights. Wipe the lenses with a dry cloth and see if that works.
If your door is still acting irradically the difficulty may not be your stop/reverse lights after all. You may have a problem with the logic board or the gear sprocket in your opener.
If your opener is the issue you may be glad to know that you most likely do not have to replace it. Components are available to garage door technicians who can repair your opener at a fraction of the price of a new opener.
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There are companies that work on all kinds and brands of garage doors. They’ll come to your private home or business and perform an entire repair and overhaul of your door if necessary. They substitute springs, rollers, tracks, sections, cables and whole garage doors.