According to the LiftMaster troubleshooting guide, one common problem is that a Security+ remote reverts to billion code technology. What causes this, and is there any fix?
One of the remotes may have reverted to billion code
If you have two Security+ remotes and only one or the other will program to the opener, one of the remotes has reverted back to billion code technology. To figure out which one has, you will either need another remote or a keyless entry.
- Clear the memory on the opener. Press and hold the learn button for 6 seconds.
- Program the keyless entry. How to program keyless entry (If no keyless entry is available, program a 3rd remote.)
- Program one of your handheld remotes. If the first remote does not program, try the second remote. How to program remote control
The remote that will not program in with the additional accessory is the defective remote.