We purchased a Craftsman Assurelink Garage Door opener, Model 139.3043. I cannot get the second the hand held remote control programmed to the opener. Please let me know what the problem could be.

ensure that the remote is Raynor and compatible with you model GDO
on the back of your garage door opener there is a colored learn button--press and release-the learn indicator light will glow for a short time usually 30 seconds. within thirty seconds press and hold the buton on the hand held remote that you wish to operate your garage door. release the button when the motor unit lights blink. if you don;t have a light, two clicks will be heard. it has learned the code. procedure will be different for multi function control.

The opener radio is not compatible with your homelink system. You need to buy a homelink repeater. Note: liftmaster and chaimberlain are the same, so if you see a reference to one of those names when searching for the repeater, dont worry, it'll work. As far as the second remote, check batteries. Then try programing again, using yellow button on the opener. Lastly, you can reset the programming and start over if all else fails. Hold down yellow button until light on button turns off. Good luck.

craftsman garage door openers are made by chamberlain.. Give them a call on their 800 number with your craftsman model number and they will help you

Make sure the small light in the wall control is not blinking. If it is press and hold the lock button for 3 seconds.

Make sure the green light in the wall control is not blinking. If it is, press and hold the 3 seconds the lock button.

Press and hold the lock button on the wall control for 3 seconds.

Have your neighbor bring over his remote and open or close your door with it. Then hold the smart/learn button in for 6 seconds on your opener. Then see if he can open your door. He shouldn't be able to because that procedure erases the memory in your opener. No remotes should work. You need to get that remote #53778 back and program it and then see if your neighbor can open your door. If he can open your door at any point after you have held that button in for 6 seconds you need to get a new door opener.

Make sure you didn't accidently knock loose any of the wiring on the rear of the motor unit while you were programming the new remote.

Plug the appliance control into a 120 Volt outlet.

Press and release the "learn" button on the appliance control. The learn indicator light will glow for 30 seconds.

Within 30 seconds press and hold the button on the hand-held remote.

Release the remote control push button. Code setting is now complete.

You say you "setup the remote and the main box but doesn't solve." I think you mean you programmed the unit but I'm not sure. Anyway try holding the smart/learn button in for 10 seconds and this will erase the memory. None of the remotes should work. Now when you are sure the neighbor will not be using their opener, program your remotes. This may be what you did but I'm not sure.