The door opener of an automatic garage door serves a very important purpose. It spares you the trouble of stepping out of your car to open your garage door. All you have to do is press a button and drive in. Garage door openers either run on batteries or they can be operated electrically. However, because a door opener is an electronic device, it stands the risk of contracting some problems that may cause it to malfunction. When a garage door opener starts behaving erratically, it may succeed in opening a garage door but may fail to close it. It’s…