So my power went out for a few hours and my AT&T + fire alarms were going off. The power is on now and my AT&T alarm shut off. The fire alarms won't stop though. I've replaced ALL the batteries and they have been going off about every 10 seconds, just one beep. I've googled this, no answer. At last I'm asking KaW. Fixes? *UPDATE* I've taken the batteries out of every damn alarm and THEY ARE STILL GOING OFF, so I put them back in. *UPDATE* It's so annoying I might just need to set my house on fire and set them to good use.
Your fire alarm is wired and receiving power from a source, the battery is just a back up. The intermittent beep means the primary power is still unavailable and only running on battery. Somebody gotta reset / restore power to the circuit breaker.
You noob disconnect the mains power and then the battery. Reconnect the mains then battery should fix it. If not burn the place down
What they said^ when I moved into a house a few years back, one fire alarm kept beeping no matter what. And when I tried to pull it, it just screamed(figuratively). Pull the batteries, disconnect the main power wires. If you do them all, and really need a fire alarm, get a dog.