Most people feel that their garage doors will always work the way they are supposed to. Then when they have an issue come up, they are stumped over why the issues are there. Most often, it is an issue with the opener and not the garage door. This is not necessarily bad news. It is relatively easy to diagnose where the problem with your garage door is. That is why we are here to tell you how to diagnose and troubleshoot your garage door opener.
Luckily, most issues do not indicate a major repair. If your door simply will not open when you push the remote button, it could be something as simple as the battery needs replaced. That is always a great starting point for diagnosing. Make sure that it is not a problem with the remote. You can do this by replacing the battery in it or pushing the button inside of your garage. Your transmitter may also be defective or your neighbors may be using the same type or frequency as you. This can cause everything to not work properly.
In the event that your garage door opens, but will not close; you could have an issue with the photo eyes. These eyes are designed to tell the door when it is safe to close because there is nothing around the door. If an eye is not lined up properly, it could be that the eyes think something is in the way. Sometimes it could simply be that they need cleaned up. However, if the door opens slower than normal, listen for sounds that may sound like rubs. If the tracks are off, your door will open and closer slower, plus make a noise. You will also want to check the tracks to make sure there is not any mud or small debris on them if your door starts to close and then stops or reverses direction.
There may also be broken chains or other issues. To check for this issue, most likely the doors will not move at all, but if they do, you will be able to visually check for issues. If you still are not able to come up with an issue, it may be time to ask for help. A door openers installer could point you into the right direction and save you a lot of time.