When we bought (2013) it was mentioned the contractors had a "universal" code programmed into the garage door openers so they could move from house to house as they were working. It appears these codes may have accidentally been left on some openers when given to new homeowners. We did reprogram our openers, so we did not have any problems, but after about 4.5 years we started getting error codes on the red and green leds. It turns out the replacement circuit board was way more expensive then an brand new Chamberlin opener, so now we have a new Chamberlin opener.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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