First Alert CO detector chirping... what’s up with it?

Home Security Systems
1

My First Alert carbon monoxide detector is chirping three times occasionally. I tested the battery, but it’s still chirping. Anyone know why?

2

If it’s chirping three times, it could mean the battery is low. Even if you’ve tested it, I’d suggest replacing the battery completely to see if that helps.

3

Zendaya said:
If it’s chirping three times, it could mean the battery is low. Even if you’ve tested it, I’d suggest replacing the battery completely to see if that helps.

I already replaced the battery. Now it’s doing five chirps every 45 seconds.

4

@Oscar
Ah, that means it’s at the end of its life. Carbon monoxide detectors usually last around 5 to 10 years. You’ll need to replace the whole unit.

5

Five chirps every 45 seconds is the end-of-life signal for a CO detector. Time for a new one, unfortunately.

6

I had the same issue. Once it starts doing the five chirps, replacing the battery won’t help—it’s telling you to get a new unit.

7

Desmond said:
I had the same issue. Once it starts doing the five chirps, replacing the battery won’t help—it’s telling you to get a new unit.

Good to know. I’ll get a new one. Thanks for the advice!

8

Yeah, once you hit the five-chirp stage, it’s done. I had to replace mine after about 8 years.

9

If you’ve had it for more than 5 years, it’s probably at the end of its life. They usually beep like that to let you know.