Nest Protect Wired User's Guide
DAILY USEEMERGENCY
PREPARATION
GREEN light above 
the Nest logo.
You turn off the 
room lights for 
the night, and 
the GREEN light 
pulses once.
WHITE light.
BLUE rotates.
Sleep well thanks to 
Nightly Promise.
Press the Nest button.
Nest Protect will walk 
you through next steps.
Nest Protect is working.
The green light means 
AC power is connected.
Nest Protect has tested 
its sensors and batteries 
to confirm they are 
working correctly.
Pathlight lights your way at 
night as you pass under it. 
It can also be set to stay on.
To set up or run  
a manual test.
“READY. PRESS TO TEST.”
WHAT YOU HEAR WHAT IT MEANS WHAT TO DOWHAT YOU SEE
DAILY USE AND EMERGENCY PREPARATION
 WARNING
• DO NOT stand close to the alarm when 
the horn is sounding. Exposure at close 
range may be harmful to your hearing. 
When testing, step away before the  
horn starts sounding.
• If the alarm ever fails to test correctly, 
have it replaced immediately! If the alarm 
is not working properly, it cannot alert you 
to a problem.
• DO NOT use a match, cigarette or any other 
makeshift fire to test the smoke alarm.
• To test the CO alarm, NEVER use vehicle 
exhaust! Exhaust may cause permanent 
damage and will void your warranty.
• NEVER use an open flame of any kind 
to test this alarm. You might accidentally 
damage or set fire to the unit or to 
your home.
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DAILY USE
POWER
Nest Protect (Wired 120V) has a small green light 
located at the top of the Nest button. It will be on 
as long as Nest Protect is getting AC power from 
the electrical wires.
If there’s a wiring problem or power outage, the 
green light will turn off and Nest Protect will 
switch to backup batteries. You’ll also see a 
yellow (instead of green) Nightly Promise light 
when you turn off the lights for the night.
NIGHTLY PROMISE
Nest Protect continuously tests itself, so  
you don’t have to wonder if it’s working.  
Nightly Promise reports on every Nest Protect 
in your home. 
When you turn out the lights for the night,  
Nest Protect will glow green for a moment - that 
means everything is working. If it glows yellow, 
one of the Nest Protects in your home needs 
your attention. For instance, the batteries are 
low, Wi-Fi is down, or there’s an issue with the 
sensors. Just push the Nest button or use the 
Nest app to see what’s wrong.
PATHLIGHT
Usually Nest Protect has its light turned off, but 
it can light your way as you walk underneath it 
in the dark. You can enable or disable Pathlight 
and set its brightness with the Nest app. Nest 
Protect (Wired 120V) also allows you to set 
Pathlight to “Always On” if you want a night light. 
It will turn on when it’s dark and stay on until it’s 
light again.
DAILY USE AND EMERGENCY PREPARATION
EMERGENCY PREPARATION
TESTING
Perform a manual test of your wired Nest 
Protect at least monthly. During a test, all 
interconnected Nest Protects in your home 
check their sensors, power, Wi-Fi connection, 
emergency horn, speaker and microphone.
When you run a test, Nest Protect will give you 
a countdown before sounding the alarm so you 
have time to move away from the loud noise.
Test procedure:
1.  Start a test by pressing the Nest button twice.
2. Nest Protect will say: “This is only a test. 
The alarm will sound.”
3. Ensure that the alarm sounds and the light 
illuminates on each Nest Protect.
4. Once the Nest Protect has made sure it’s 
working, it’ll tell you everything’s okay. If you 
have interconnected Nest Protects, all of 
them should speak.










