2 remotes, which I can program both individually, but they cancel each other out and will not work at the same time.
Programming remotes can challenge patience sometimes. A suggestion I have to help the expert provide a better answer is to add the model number of your garage door unit and remotes to this thread. In the meantime, I attached two links below that may hold some clues to this problem. Hope this helps!
Thank you for your question.
I can understand your concern when only one remote will work.Don is correct that you have a remote problem.Member
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