It can be caused by pressure and wear and tear. If your garage door isn't working, you should always call a service to have the tracks replaced. The shut reverse, where the door closes and then comes back up, is a wackier malfunction that happens with some doors. Problems like this are often the result of a misadjusted limit setting on the opener. A dead transmitter remote is a small problem but a common reason your garage door won't open often.
It goes back up if it closes before the set distance is met because it could have detected something. Due to weather changes, your garage door components may change. The travel down setting can be changed to fix the issue. Electric garage door openers made after 1993 have two safety mechanisms that operate when the door is closing. Since that date, all garage door openers include door sensors that prevent the door from closing until all obstructions are out of the way. A misalignment of the reversal system is the most common scenario. The door opener interprets as an object in the way of the door's descent if the two sensor housings are out of alignment.
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 change a limit switch.
If your garage door remote doesn't work, you can replace the batteries. An electrical surge, even a small one, can cause a breaker to trip. If the breaker that powers your garage is no longer in the "On" position, you need to check your home's breaker panel.
It is important to 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 or closed 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.
You may need to adjust the limit screws if your garage door won't close all the way. The screws have contacts that let the garage door opener know how far to open or close. Sometimes a garage door refusing to close may be a bigger issue than just fixing the sensor, cleaning the tracks, or resetting the travel/limit setting. It is probably time to call in the professionals when it is not a common issue.
Garbage cans, shovels and even mice can cause damage to the wiring. Since the wiring is low voltage, any small electrical signal can cause the opener to run. The opener's logic board or the motor unit itself could be to blame when the door begins to descend on its own. Similar to your travel down setting, your garage door opener's limit switch governs where your door stops when raised or lowered.