The door will automatically reverse itself if it is 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 needed. If your opener is more than five years old, it is most likely programmed to pull the garage door up with a specific amount of force. Damage to the rollers or the door tracks can make it difficult for the opener to lift the door. A nut on the opener can be turned with a wrench to increase the pulling power of the opener. If the garage door closes, turn the down limit switch screw clockwise and then use a flat blade screwdriver to open it.
When the garage door keeps going back up while you try to close it, you may encounter problems from time to time. Your garage door has a logic board like a computer. The logic board is the brain of your garage door opener and can wear out over time.
If your garage door remote doesn't work, you can replace the batteries and it will work again. A small electrical surge can cause a breaker to trip. If the breaker that powers your garage isn't in the "On" position, you should check your home's breaker panel.
The limit switch requires only a flathead screwdriver if the garage door isn't staying open or closed. LiftMaster has a helpful resource about how to adjust a limit switch.
Universal garage door remote controllers can work on many openers. When the opener makes a humming noise when prompted, it can be a sign that it won't open. A new opener is the only way around a stripped gear. Manual activation is the only way to use the door in the meantime. Only a garage door service professional can replace your opener. If your house mate hits the remote button while you're working, you won't lose a finger.
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 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 hits the open or closed limit. You may have to adjust your closed limit settings if your garage door keeps opening by itself after you close it. If the settings are too high, the opener will think that a door has closed too early when it touches the ground, and will mistake it for an obstruction.