Home / Garage door / Era chart
If you know approximate manufacture years or the learn-button color, use this chart before buying a remote or keypad.
| Era | Typical tech | Legacy remotes | Current path | Keypad path |
|---|---|---|---|---|
| 1984–1992 | DIP / early 390 MHz | 61LM, 63LM | Confirm receiver; MAX not for all pre-1993 | 66LM discontinued |
| 1993–1997 | Billion Code ~390 MHz (green) | 81LM, 82LM, 83LM | 893MAX / 890MAX / 895MAX | 878MAX (was 66LM / 877MAX) |
| 1997–~2005 | Security+ ~390 MHz (red/orange) | 971LM, 973LM, 974LM | 893MAX family; 894LT for some multi-button packs | 878MAX (was 976LM / 977LM) |
| ~2005–2014 | Security+ ~315 MHz (purple) | 371LM, 372LM, 373LM | 893MAX / 890MAX; 892LT for 372-class | 878MAX (was 377LM) |
| 2011+ | Security+ 2.0 (yellow) | 891LM, 893LM | 893MAX / 890MAX still cover; or stay on 891LM/893LM | 877LM / 878MAX |
Always verify with the learn-button color on the motor head. White Security+ 3.0 openers need a current OEM compatibility check — classic MAX charts do not assume them.