I have an old Craftsman door opener That has been opening on it's own and have looked at all the possible causes and no fixes seem to work. I removed wires from the wall mounted opener so it isn't a wiring issue. The door opened while the remote was gone in the car so it doesn't look like a remote problem plus it's new. I thought maybe it was a radio frequency issue so when trying to reset the codes by pushing and holding the SR code button the led won't go out no matter how long the button is held down so the existing codes can't be erased. So looking to see if this door opener can be reset by some other method.
I removed the wires at the opener itself so that shoul eliminate the wiring. The SR code button is yellow and the original remotes are long gone so no numbers from there. My opener doesn't have the photo sensors and uses force or torque settings for safety reverse. I have changed the plastic worm gears so it looks like it's time for a replacement seeing as that I can't reset the codes. I noticed the front sticker doesn't have a model number at all and the only number is 41A3625 which is on a sticker by the SR button. The original manual I have is for a Model 139.18616sr 1/2 Hp.