I have a Craftsman 41a3625 garage door opener. How do I reset codes to prevent neighbor's car from opening my garage door? Thanks

SOURCE: Garage door opened by neighbor

Have you seen the neighbor open your door? The reason I ask is because it is almost impossible. The most common cause of a door opening by itself is a bad wall control or the wiring leading to it. You can temporarily eliminate both possibilities by removing the wire from terminal 1 at the rear of the motor unit. Do this and ask your neighbor to bring over his remote and try it on your opener.

SOURCE: I have a craftsman 41a3625 garage door opener with

On the back of the motor unit near where all those white wires go you will find the smart/learn button. Press and immediately release this button and then walk over to the keypad and key in any 4 digit code you like and press enter.

SOURCE: program craftsman garage door opener and embedded car door open

Either your car or your door opener is an older model and they are not compatible. Hopefully it is the opener that is older.

SOURCE: We have a 1/2 HP

I have some knowledge of your system and looked through your manual.Have you had your neighbor program their remote also?If they only have one remote and never programmed it,it is most likely pre-programmed to send out a signal to all of the frequencies within the unit.Systems like this normally have several operating frequencies to avoid your situation.Same as a remote control car.If it was never programmed,it most likely does not 'search' and still sends a signal to all possible frequencies.Once you program it,it normally will key in on one frequency only.If yours does not also open theirs,that would be a good indicator of what I described.If this does not solve it,please do not approve/disapprove this yet as it will cut off our link,unless your problem is solved 100%.If you have any questions or need more help,just comment here and I will get an autolink to your post and reply ASAP.Good luck,Greg

SOURCE: I have a Sears Craftsman HBW0777 Garage Door

I had the same issue yesterday with my remotes which are model 850CB. I fixed it by following these steps on Chamberlain's help site:
1. Press & release the "learn" button on the motor unit. 2. Within 30 seconds, press and hold the button on the remote. 3. Release the remote button when the light bulb on the motor blinks. It has learned the code.

http://help.chamberlain.com/help/en-us/programmingInstructions/ and enter your remote model number for re-programming instructions.

That worked for me. Not sure why it "lost" the code in the first place. By the way, I only had to do this for one remote, the other started working after the first was re-learned.