![First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com](https://m.media-amazon.com/images/I/71bOL6iOrqL._AC_UF894,1000_QL80_.jpg)
First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com
![Need help with this carbon monoxide detector as getting problems and its chirping/ showing yellow light. Detector model is a BRK CO850MBXi. Full description of problem in comments. Any help would be Need help with this carbon monoxide detector as getting problems and its chirping/ showing yellow light. Detector model is a BRK CO850MBXi. Full description of problem in comments. Any help would be](https://i.redd.it/h6sbmfw4p1m71.jpg)
Need help with this carbon monoxide detector as getting problems and its chirping/ showing yellow light. Detector model is a BRK CO850MBXi. Full description of problem in comments. Any help would be
![First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated - Combination Smoke Carbon Monoxide Detectors - Amazon.com First Alert SCO501CN-3ST Wireless Interconnected Combination Smoke and Carbon Monoxide Alarm with Voice Location, Battery Operated - Combination Smoke Carbon Monoxide Detectors - Amazon.com](https://m.media-amazon.com/images/I/61iVr9gUzvL._AC_UF894,1000_QL80_.jpg)