How do I reset my garage door opener?

To reset your garage door opener to restore function after malfunction, power outage, or need to reprogram remotes, you need to reset logic board and reprogram settings. For most LiftMaster, Chamberlain, and Craftsman openers, the reset is done via Learn button located on back or side of opener motor unit hanging from ceiling, often under light cover and colored yellow, purple, red, or green depending on model. To erase all remotes and keypads, press and hold Learn button for 6 to 10 seconds until LED goes out, which clears memory. To reset logic board and fix erratic behavior, unplug garage door opener from power outlet for 30 seconds to a minute, then plug back in, which power cycles board and resets error codes. After power reset, you may need to reset travel limits if door doesn't open fully or close fully: for older openers, adjust limit screws with screwdriver; for newer electronic limits, press and hold up and down limit buttons until they blink and set open and close positions. Reset safety sensors by cleaning lenses and aligning until LEDs solid. Reprogram remotes after erasing by pressing Learn button briefly and pressing remote button within 30 seconds. If wall console has lock mode engaged, press and hold lock button for 5 seconds to unlock and reset lock. Test door several times after reset to ensure proper operation. If reset fails, logic board may need replacement costing 150 to 300 dollars.