Garage door openers are meant to stand the test of time and last for years, but eventually they all konk out at some point. You can attempt to fix the engine or simply buy a new assembly. Either way, you will want to learn a little bit about the mechanics of garage door openers. Installation is something you can do yourself, as long as you follow the manufacturer's instructions and a few basic guidelines. This is a job that will require an extra set of hands, so if you can't find a neighbor to help, you might want to hire some professional garage door opener installers.
Installing a garage door opener is no more complicated than changing out car batteries, but it takes a little more muscle and planning beforehand. The first thing you will need to do is prepare yourself and your work area. Pull the cars out of the garage and place a ladder underneath the motor. Then you will want to check the door. Make sure it is well-lubricated and opens easily with your hands; if the door doesn't open well by hand, even the strongest motor will have difficulty opening it.
Survey the edges of the garage door and the area surrounding the ceiling mount to make sure there are no loose ropes or debris that could get tangled up in the chain or door as you are working. Finally, take off all loose jewelry or clothing; if you are too close to the door or opener, these items could get wrapped up in the assembly, endangering you and possibly breaking your new motor. Even if you have been installing garage door opener assemblies for years, you can never be too cautious.