In April or May we had a new garage door opener installed. Our garage is
tiny. Can't park a car in it so how it is called a garage, I do not know.
New unit is a Chamberlin and from what I can see on line, the cheapest one.
Came with one Clicker. Purchased two additional Clickers and a keypad.

So for about three weeks, we had assorted problems, mainly because the
installer was, IMO a buffoon. But finally another guy came out to put
things right and everything seemed fine until two days ago.

Daughter rang the doorbell. I then asked her why she didn't come in through
the garage and her answer was that the keypad didn't work. And it didn't.
Keys lit up but nothing happened when we put in the code.

I did change the battery but wasn't sure of its age. Still didn't work.
Bought new battery and put it in. Still didn't work. Now this isn't the
code but I will use it for the sake of this problem. Let's say that our
code was 12345.

Installer snapped the battery in more firmly. Still didn't work. Asked me
if I had a phone. Obviously I did as he had called me on it. He had a
phone in his hand. But I went into the house to get the phone. Why? Still
don't know. He never asked to use it. But...

When I got back with the phone, he told me that he had reprogrammed the
unit. Not sure how since he had no ladder or step stool and I had only been
gone for less than a minute. Maybe 20 seconds. Then he said that we needed
to put in 123455. Say what? How could 12345 have worked all this time?
And we did not have to press the # either. Just the numbers, although my
instructions say to press the # button.

Oh and... While I was waiting for him to come, I tried to put in the code.
And repeatedly, as I put in 1 and 2, the door began to come down. Came down
one section, stopped and then went back up. It did this several times. And
then it did nothing when I tried to put in the code.

When I told my daughter of this she insisted that it can not be right. She
is the one who usually uses the keypad and she knows what number she has put
in. She has used 12345 for at least 4 months and it worked!

So then I went out to try it. Tried 123455 three times and nothing. Then
waited about 10 minutes and tried it again. It worked! And it worked
repeatedly.

I feel like I am in crazy land. How could this have been? I am waiting for
the installer to call me back and I will go out and keep trying it to see
what happens.