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  1. Liked this: Outdoors I purchased the garage door opener md- 9- 53778 and my unit has a learn button. when it programs it kicks the 2nd unit out and visa versa. each unit will program but only one will work at a time. I use to have three going so I don't get it

    Start by clearing all the codes on the opener. To do this press and hole the "learn" button until the LED next to it goes out (about 6 seconds). Now no remotes should operate the door. Now program …