Ghostly Beep

Early this morning, the smoke alarm began to beep... that incredibly annoying high-pitched beep that says the battery is dead.

I replaced the battery of course, but that did not stop the beep.  Since it was malfunctioning, I looked it up online, and somewhere it said that if you figure out which breaker is connected to the smoke alarm, you can turn it off, remove the battery, hold the test button for 15 seconds, and that would reset it.

I didn't have time to fix it before leaving for the day, so I worked on it once I got home after 1 am.

I spent forever trying to figure out which breaker in the house was feeding the smoke alarm.  Finally, I decided that I just had to rip it out of the ceiling because it was driving me mad.  Surprisingly, it was not even hooked into the house electricity.  I held it to my ear and waited... yep, there was the beep.  I put it outside.

Happy with myself, I began preparing for bed... and heard the beep again.  Coming from the same area.  I searched all the ceilings for other fire alarms, to no avail (hey, it's a somewhat new house, there could have been one I missed).  I began to think maybe I was going crazy, hearing a beep that was not there at 2am.  It was incredibly creepy to hear a beep from an empty ceiling.

Turns out that directly under that original smoke alarm, we had put the supposedly broken CO2 alarm in a drawer over a year ago, and then never opened the drawer again.  It was the one beeping.

Now the CO2 alarm and the smoke alarm are both outside.  All is well.  I am not crazy yet.