There are two major types of springs, torsion and extension. Extension springs go along the tracks parallel to your ceiling. Torsion springs are wound around a bar that is above your garage door opening.
In most cases if one of your springs is busted it will be completely not possible to open your garage door. The exception is if you have a single door and it is made of a light metal. In any case it is best not to attempt to open your door yourself. It can lead to injuries.
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If you have extension springs and one of them is busted, you may be able to discover a substitute and replace it yourself. However torsion springs are another matter. If you have a broken torsion spring you should call a garage door company to carry out the repair unless you’ve been specifically educated on replacing torsion springs.
If you try to shut your garage door using your opener and the door goes part way down, then stops and goes back up, you most likely have an object blocking your door’s travel path. Or maybe not
By far the most common sensor that stops and reverses your garage door is a pair of "eyes" that are situated toward the bottom of your garage door’s track on either side of the door.
One reason on your "eyes" to not work is that they have been bumped in such a manner that they do not point in the proper direction. A small adjustment can usually fix this. within the correct direction.
The major cause that your door will stop and reverse is that your "eyes" are functioning just as they are supposed to. There is something blocking your garage door. Sometimes the object that is blocking the door is not clear, so carefully look around your garage door opening. Eventually you’ll figure out what it is.
If you have 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 dirt, a bug 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 problem 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.
A DIY kind of house owner can exchange these things, however you will need the right parts. They can be difficult, however not unimaginable to find.
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One of the good things regarding garage doors is that they are very dependable. Most homeowners go years and years without a difficulty. That means that when a issue does develop, it is frequently a new experience for a home owner. With any luck your repair will be easy and the price reasonable. Good luck!