Smoke Alarms
Introducing Nest Protect
Get started
Explore features and settings
Safety and certifications
- Learn when to replace your Nest Protect
- What to do if Nest Protect detects smoke in your home
- What to do if carbon monoxide is detected
- Learn about Emergency Shutoff
- Learn about carbon monoxide (CO)
- Replace your Nest Protect after expiration
- Troubleshoot First Alert Smart Smoke & Carbon Monoxide Alarm set up issues
- Set up your First Alert Smart Smoke & Carbon Monoxide Alarm
Fix a problem
- Error codes
- Can’t connect Nest Protect to the app or Wi-Fi
- Why Protect’s green power light is on, but the app says the power is out
- Protect’s speaker or horn aren't verified by Sound Check or Safety Checkup
- Reset Nest Protect and erase all settings
- Troubleshoot when nothing happens after removing 1st gen Nest Protect's battery tab
- Troubleshoot wired Nest Protect power problems
- Troubleshoot your Home Report