We have a doorbell and it works. We were here about two and a half months when one morning as the sun was shining through the parlor hallway I noticed we had a door bell, and a pretty cool looking one too!
But of course it didn't work.
As a matter of fact on the back door there was an old faded index card taped on the door frame by the buzzer that said, go to the front door the door bell doesn't work.
It wasn't top priority on our list to fix the door bell. Months went by. Finally we looked at it. Well actually John did. My job was to stand in the kitchen and say, "hey the door bell works." I went to the back door to see he had just cut the wires to the old bell.
Strangely out of the two buzzers on the house the old one did work and the new one that sported the note was nothing more than a new buzzer and 12 inches of cord jammed in a hole. It's no wonder it didn't work. So being the good electrician he is, he took the new buzzer and attached it to the old wire from the original buzzer. And, ding-dong it works.