Is it true that one garage door opener remote can open any garage door?
Different garage door openers operate on different frequencies. However, some of these frequencies overlap and garage door opener remotes that operate on one frequency will open a door if it happens to be one that operates on the same frequency. However, there are opener remotes that use multiple frequencies and are marketed as replacements for lost remotes. They will open most doors. However, you can purchase a cycling opener which changes your frequency every time you open and close the door and responds only to your remote. This garage door opener is an example of a cycling opener.