How many times do you have to push the button to program a garage door opener?

The number of times you push the button to program a LiftMaster garage door opener depends on device being programmed, but typically you push Learn button once and remote button once or twice. For remote control programming, you push Learn button on motor unit once, press and release, LED lights steady for 30 seconds, then within 30 seconds you push and hold remote button once until opener lights flash or you hear two clicks indicating success, some models require pushing remote button twice. For wireless keypad programming, push Learn button once, then within 30 seconds enter 4-digit PIN on keypad and push Enter button once, opener lights flash indicating success. For Homelink in car, push Learn button once on motor unit, then push Homelink button in car 2 to 3 times, holding each time for 2 seconds, until opener lights flash. For MyQ, push Learn button once then follow app. So typically you push Learn button once and remote or keypad button once, total two pushes, but some require pushing remote twice. If programming fails, repeat. To erase all codes, hold Learn button for 6 seconds, one long push. Consult manual for your specific model as steps vary slightly. So generally one push on Learn button and one push on remote is enough.