![Kidde Combo photoelectric smoke/C0 alarm going off every hour… will beep twice. Say fire twice. Beep again. Then stop. : r/firealarms Kidde Combo photoelectric smoke/C0 alarm going off every hour… will beep twice. Say fire twice. Beep again. Then stop. : r/firealarms](https://i.redd.it/kidde-combo-photoelectric-smoke-c0-alarm-going-off-every-v0-p3dtirm3z3z91.jpg?width=3024&format=pjpg&auto=webp&s=138320b29de601be3376097bb496302466ee2d5e)
Kidde Combo photoelectric smoke/C0 alarm going off every hour… will beep twice. Say fire twice. Beep again. Then stop. : r/firealarms
![Siren on Twitter: "Hello, friends! Be #FDNYSmart and check to make sure that your smoke and carbon monoxide detectors are working properly. Always remember to test them at least once per month Siren on Twitter: "Hello, friends! Be #FDNYSmart and check to make sure that your smoke and carbon monoxide detectors are working properly. Always remember to test them at least once per month](https://pbs.twimg.com/media/Fl9O4RuWQAQb1lb.jpg:large)
Siren on Twitter: "Hello, friends! Be #FDNYSmart and check to make sure that your smoke and carbon monoxide detectors are working properly. Always remember to test them at least once per month
![If your CO alarm chirps every 30 seconds, it's not an emergency but you should replace the CO alarm a.s.a.p. - Fire Line If your CO alarm chirps every 30 seconds, it's not an emergency but you should replace the CO alarm a.s.a.p. - Fire Line](https://fireline.seattle.gov//wp-content/uploads/sites/21/2020/03/co_alarm3-1024x682.jpg)