This morning, our smoke alarms started chirping every 108 minutes…I mean 1 minute. Started switching batteries around. Chirp. Vanessa ran over to Walgreens to buy replacement batteries for all alarms. Chirp. Cleaned out all alarms with air can. Chirp. Vanessa called tech support and somehow got disconnected. Chirp. She called them back and they told her to kill the power on the problem alarm because it was probably misremembering the battery charge. Who knows where these things are getting their power from? So we had to turn off our main house power to cut power to alarm, remove battery, and press test button for 30 seconds, then replace battery and turn power back on. This is the undocumented method for returning the Firex 5000 (FADC 120-1182) smoke alarms to their factory settings. I have learned that one of the most irritating sounds in the world is a loud beep every minute. I was almost thinking of another undocumented alarm reset method…ripping the alarm off of the ceiling.
UPDATE: Vanessa says it’s chirping again! Lesson learned, don’t get Firex smoke alarms. This one is only 4 years old. She switched 2 detectors around and it seems to be that socket, so she just unplugged it.
UPDATE: The next day, a friend came over and looked at it for us. He tightened an electrical twist connector in the wall and it seems to be working again.
UPDATE: Years later, the fun returns. I’ve found on one of them that it stops chirping when I leave the battery door ajar. How fun. Anyway, you might try checking the three twisty connections that connect your fire alarm to the power, ground, and alarm network. You have to remove the alarm from the ceiling, unplug it, and pull the wires out enough to examine the connections. If one of the connections isn’t making good contact, it could cause your alarm to be powered only by the battery. I just decided to replace this alarm, since it was only about $10 for a new one on Amazon.