I know this is an older thread now but this is frustrating. I have two garage doors with Craftsman 1/2HP 41A5021-2F Red button type. Both are now messed up and will only program one opener. I reset and can program any one of the 4 remotes (only one button) to the door but will not learn anymore. Reset again and i can program another but I CANNOT program more than 1 button of 1 remote to a door. Prior to this i had 4 three button remotes and each door had a key pad entry system. I am now up the creek without a paddle! I have even unplugged the units for hours and still the same behavior!!!

I tried your suggestion, with no results. As soon as I pressed and released the learn button a led light on the back of the operator came on for about 60 seconds. The instructions on the back of the opperator said to "1.press and hold transmitter push botton. 2.press receiver code button. 3.When opener light flashes, release both push buttons " Is it possible that changes have been made to the system sence 1995? Do you have any other suggestions? Thanks for your help.

Hi Everyone, I have an old (10/95) craftsman opener that works fine #139.663956 / S.N. 4935A00718 In the past year I have bought 3-4 remotes that I was told would work. But did not ,and since my unit does NOT have a learn button,I am lost as to what to do. The #'s on my remote are in places worn out so I can not see all the model #'s. My wall switch (power) is model 139.53755 . Can anyone offer suggestions? I am disabled and may need someone to help me so if I can explain to them what to do,I may be able to get this new remote programed or find a suitable replacement. I recently purchased a craftsman #139.53778, but with out the learn feature on my unit and not knowing what 9 # code to use ,it to is of no help to me. Any ideas?? Thank you .

The problem I have is my door wont open at all. Neither the remote nor the wall button will budge it. The wall unit and the overhead opener seem to be communicating, since the lightbulbs are flashing, and turn on and off when told to. The remotes seem to have no affect at all. I replaced the chain onto the sprocket assemby and was adjusting the up and down on the main unit, Unit does nothing now when I press button on wall, is it possible to have adjusted the up/down too much to make unit not operate?Anyone have any ideas why my door won't work at all? I would expect the motor to at least chug or something, but...nuthin! Just flashing lights when i press the wall buttons. Sears Model 139.53975SRT1. HELP!