How to Set Up Your First Alert Onelink Smoke & CO Detector

What You'll Need

• First Alert Onelink Smoke & CO Detector
• Onelink app (iOS/Android)
• 2.4GHz Wi-Fi network
• Onelink/First Alert account

Step-by-Step Setup

1. Prepare mounting: Use existing wiring or battery-only install
2. Install batteries: Insert backup AA batteries
3. Mount detector: Attach to ceiling or wall
4. Download Onelink app: Install from app store
5. Create/login account: Sign into Onelink
6. Add device: Tap "+" and follow prompts
7. Connect to Wi-Fi: Enter network credentials
8. Test: Press test button to verify operation

Key Features

• Smoke + CO detection: Comprehensive protection
• Voice alerts: Announces type and location of danger
• Phone notifications: Alerts even when away from home
• Apple HomeKit: Works with Apple Home ecosystem
• Interconnected: All Onelink devices alert together
• 10-year sensor life: Long-lasting protection

Troubleshooting

• Offline notifications: Check Wi-Fi connection
• False alarms: Keep away from kitchens and bathrooms
• HomeKit shows unavailable: Check app first, then HomeKit
• Chirping: Replace backup batteries
• Factory reset: Hold test/silence button for 10+ seconds