Can only program one remote garage opener at a time.
Model number 139.53674SRT2. Has one remote and one keyless. Batteries good. Erased memory, and now can program either the remote or the keyless and it will work, but programing one erases the other. Keyless model 139.53684 remote model 139.53681B. All worked fine for years. Problem started when we replaced a battery on the remote. One answer mentioned a new logic board for the receiver is needed, but parts could not locate the part number for this board (telephone contact). Any troubleshooting hint appreciated.
B b g...
Expert
This would be a logic board issue. A new board model # is 41A5021-3D. If sears can't find it for you then go to chamberlain.com or liftmaster.com and their model # is 41A5021-1i. This is the manufacturer of craftsman product. Thanks BB
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