Phantom doorbell ringer
I installed a doorbell for a friend a couple weeks ago - simple doorbell from Lowes, one tone for the back door and a different one for the front door. Everything seemed to be working fine.
The back doorbell has been ringing by itself every now and then. Or at any rate, the tone for the back doorbell has been sounding. It only rings once and in no particular pattern, sounds like it's happened maybe 3 or 4 times in the last week. She swears it isn't the neighborhood kids; there are no wires touching in the box, or so far as I can see at the doorbell button and I don't see water anywhere. The rest of the wiring is inside walls were I can't get at it.
Is this a common symptom of a defective doorbell? She said it never happened with her old one. Mice? Leaks? Anybody else run into this?