Caftsman Garage Door Opener Code won't erase, neighbor open door
I have a Craftsman 139.53615SR made in 93. Recently I changed my transmitter/remote code. The opener accepted it and works. But since then the door can also be opened by my neighbor's remote. I tried to change the code several times already. The opener accepted all the new codes every time but my neighbor still can open my garage door. Please help.