My garage door opened by itself a few weeks ago. An air show was in progress at the time and I concluded that signals from a military aircraft had overwhelmed the receiver. Still this was not a good sign.
Up to this point, I had never given much thought to the garage door situation. A quick check revealed that cloning a door code is simplicity itself. If that wasn’t bad enough, it is possible to open many doors by inserting a tool at the top center and snagging and pulling the emergency door release cord.
Units equipped with a rolling frequency system are available and will prevent cloning. Removing the pull cord from the emergency release will solve the second problem.
A week later it happened again and I discovered that it had been caused, both times, by my wife rummaging in a kitchen drawer which contained another remote.
I am relieved that I don’t have the problem I suspected but looking at the issue reminded me of the dismal lack of effective security in most homes.