![Kidde Fire Safety on Twitter: "🔔 4 Short Beeps: Urgent – CO has been detected! Immediately leave your home and call 911." / Twitter Kidde Fire Safety on Twitter: "🔔 4 Short Beeps: Urgent – CO has been detected! Immediately leave your home and call 911." / Twitter](https://pbs.twimg.com/media/EWtraZfWsAAxGOX.png)
Kidde Fire Safety on Twitter: "🔔 4 Short Beeps: Urgent – CO has been detected! Immediately leave your home and call 911." / Twitter
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Kidde Combo photoelectric smoke/C0 alarm going off every hour… will beep twice. Say fire twice. Beep again. Then stop. : r/firealarms
![900-0119 120V AC Talking Smoke & Carbon Monoxide Alarm with 2 AA Front-Loading Battery Backup - Kidde Canada 900-0119 120V AC Talking Smoke & Carbon Monoxide Alarm with 2 AA Front-Loading Battery Backup - Kidde Canada](https://images.carriercms.com/image/upload/w_350,h_350,c_scale,dpr_3.0,q_auto,f_auto/v1551119470/kidde/products/carbon-monoxide-alarms/kidde-carbon-monoxide-alarm-KN-COSM-IBA-CA.jpg)