Look at the rear of the motor unit near where all those white wires go and post the color of the smart/learn button. Can't help you without it. Don

Thanks Don
The antenna is on the Little black box mounted on the wall, I took the cover off the black box to expose the LED green light which memorizes the code, when I press the chosen button on the new remote the LED blinks which means the new remote memorized the code, but nothing happens. very frustrating.

At this point you need more help than I can offer long range. I'm sorry.

if you have a purple learn button the remote you have won't work with it

Did you ever find a remote that works with your Sears unit. I have the same one.

Thanks