I've got a doorbell that works, it is the normal two chime "ding dong", but it goes "ding chunk" where the second chime seems muted. I looked at it and it's mounted right, it gets hit with enough force. What would cause this?


Turns out that there was an intereference hitting into it--the cord coming into the doorbell box "from the wall" was bent up and barely touching the chime bar. So bent it down a little and working doorbell again.

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    It's also common (though not the case here, it seems) to have a front/rear doorbell setup where one set of terminals goes "ding-dong" and the other just goes "ding." – Ecnerwal Oct 13 '18 at 14:57

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