You should check the wall panel near the entrance of your home to make sure that it has been corrected. The limit settings on most garage doors are open and closed. When your garage door is completely open and when it is completely closed, these settings tell you how far up the track you can go. 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, and therefore mistake the ground for obstruction.
The limit switch needs only a flathead screwdriver if the garage door isn't staying open or closed. LiftMaster has a helpful resource that explains how to adjust a limit switch.
If your garage door remote doesn't work, you can replace the batteries and it will work again. 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 the breaker panel.
The limit screws might need to be adjusted if the 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. It is possible that a garage door refusing to close is a bigger issue than just fixing the sensor, cleaning the tracks, or resetting the travel/limit setting. When it isn't one of the common issues, it's probably time to call in the professionals.
Pressure and wear and tear can cause door tracks to be out of alignment. If your garage door isn't working, call a service to get the tracks replaced. The shut reverse, where the door closes and then comes back up, is one of the wackier things that can happen with doors. Problems like this are caused by 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.
Garbage cans, shovels and even mice can damage wiring closer to the photo eyes. Since the wiring is low voltage, a small electrical signal can cause the opener to run. The opener's logic board or the motor unit itself may be to blame when the door begins to descend on its own. Like your travel down setting, your garage door opener's limit switch governs where your garage door stops.
When the garage door keeps going back up while you try to close it, it's a problem. Your garage door has a logic board like a computer. The logic board is your garage door opener's brain and even with machines, a brain can wear out over time.
