The door will automatically reverse itself if it's programmed not to close on foreign objects. If your door behaves this way, you should have a maintenance specialist inspect the limit settings on your garage door opener and make adjustments if necessary. If your opener is more than five years old, it will most likely have a preset amount of force needed to pull the garage door up. Damage to the rollers or the door tracks makes it difficult for the opener to lift the door. A nut on the opener can be turned with a wrench to increase the opener's pulling power. If the garage door closes, turn the down limit switch screw clockwise and then use the flat blade screwdriver to open it.
When the garage door keeps going back up while you try to close it, it may be a problem. Your garage door has a logic board just like a computer. Even with machines, a brain can wear out over time, and the logic board is your garage door opener's brain.
Pressure and wear and tear can cause door tracks to be out of alignment. If your garage door is malfunctioning, call a service to have the tracks replaced. The shut reverse, where the door closes and then comes back up, is a wackier malfunction. A misadjusted limit setting on the opener is often to blame for problems like this. A dead transmitter remote is a minor problem but a common reason your garage door won't open often.
There are universal garage door remote controllers that can be used. When the opener makes a noise when prompted but won't open, it's a common mistake. The only way around a stripped gear is a new opener. Manual activation is the only way to use the door. The replacement of your opener should be done by a garage door service professional. If your housemate hits theremote button while you're working, you won't lose a finger.
The garage door remote can be replaced if it doesn't work. Even a small electrical surge can cause a breaker to trip. If the breaker that powers your garage isn't in the "On" position, it's time to check your home's breaker panel.
You should check the wall panel near the entrance of your home to make sure that it has been corrected. The open and closed limit settings are what most garage doors have. The settings tell you how far up the track to go when the garage door is completely open and closed. The garage door stops when it reaches the open limit. If your garage door opens by itself after you close it, you may have to adjust your closed limit settings. If the settings are too high, the opener will think that a door has closed too early when it touches the ground.
The limit switch needs only a flathead screwdriver if your garage door isn't staying open or closed. LiftMaster has a resource that explains how to adjust a limit switch.