A handy troubleshooting chart from the User Guide.

Troubleshooting - Smoke + CO Alarm with smart features

Why am I not able to reset the device?

Troubleshooting - Smoke + CO Alarm with smart features

How do I set up my Smoke + Carbon Monoxide Alarm with smart features?

Getting Started - Smoke + CO Alarm with smart features

I have a technical question. How Can I Contact Kidde?

Troubleshooting - Smoke + CO Alarm with smart features

Why do I see the LED ring not showing any light on the alarm?

Troubleshooting - Smoke + CO Alarm with smart features

How do I enroll the alarm with Wi-Fi connection?

Getting Started - Smoke + CO Alarm with smart features