Before the 1990s, most garage door manufacturers used single code technology for garage door openers. This meant that your unit operated on a single code so when you pressed your remote, it would use that same code to open and close your door every time.
Current garage door openers use what is called rolling code technology — the opener’s code “rolls” or changes every time you press your remote. This technology makes it impossible for someone to know the code your opener is using.
If your equipment is out of date, Garage Door Guy carries a full line of Liftmaster, Genie, and Sommer products on our vehicles so that we can update any outdated equipment while on your premises.