Getting back to the original concern, when we moved in (2013) there was a comment made about a "universal" code programmed into the MVP openers so the trades could get into the houses to work. In any case we deleted all codes and added our own. I have replaced one opener with a Chamberlin unit that uses a rolling code system and will shortly be replacing the other.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV.
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