Here are a few issues you may be dealing with in your garage.
Problems with 18 garage door.
If your garage door is closing fully and then reversing to open again then it may be due to a problem with the close limit switch.
For garage doors that sometimes open and sometimes not there is a simple solution a dying battery whether in your remote actual opener or external opener.
Most homes today are being built with either an 18 7 garage door or both a 16 7 and an 8 7.
The batteries must be replaced and the best place to start is with your remote the easiest and most cost effective option and the most likely malefactor.
As with many such problems the most common problem is the simplest one the motor unit has been unplugged.
In order to fix this you ll want to make small changes to the close limit setting until the door opener knows to stop once the door has reached the floor.
It s also possible that the circuit breaker fuse or gfci outlet powering the door opener circuit has tripped or burned.
All you have to do is ask your builder to increase your garage size to accommodate an 18 wide opening which is an upgrade much like adding a few feet to your bedroom.
These common garage door problems are solvable and with a little bit of diy you can keep your garage door opener working for years.