The problem was the code was the opposite of what it said.
And the buttons had to be pressed and NOT let up.
I typed this procedure to tape on the top of the unit.
The procedure is wrong in the documentation.
https://www.manualslib.com/manual/877268/Clicker-321.html
This is the correct procedure (or at least the one that worked).
You observe the number side labeled 1 thru 10; not on side labeled OPEN.
The definition of "DOWN" is the position of height where a pen pushes it in.
If the pen pushed one side in, that side is DOWN; the other side is UP.
There is a hump which is the UP side; a shallow depression is the DOWN side.
Clicker switch left button is S1, middle button is S2, right button is S3 oriented with the keychain opening toward you and with the three buttons
the furthest away from you facing up so that the red led light can be seen.
Simultaneously press & hold (and keep holding) S1 & S3 until the LED blinks
and eventually stops blinking (in about 13 seconds when I did it).
Only when it stops do you let up on the button (contrary to instructions).
You have only fifteen seconds to initiate the next step.
Press and hold the desired S# button until LED blinks once
(this took about 5 seconds when I did it).
At that blink, let up on the button (contrary to instructions).
You have only fifteen seconds to initiate the next step.
Press once each S1 or S3 button to enter the desired code in sequence.
For example: S3 S3 S3 S3 S3 S1 S1 S1 S1 S1
Immediately upon that final press the LED will blink once.
The desired button is now programmed.
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