Installation Guide

15
Battery replacement
The Nest app will notify you when a Detect’s battery
gets low. Remove the battery and replace it with
another Energizer CR123 or Panasonic CR123A 3V
lithium battery.
To open the battery compartment:
• If Nest Detect is mounted to a surface, grip the top
and pull it firmly toward you.
• If Nest Detect is not mounted to a surface, use a
flathead screwdriver to pry off the backplate.
Troubleshooting offline issues
If one or more Detects are listed as offline in the Nest
app after installation, they may be too far from Guard
to connect. You can install a Nest Connect (sold
separately) to bridge the gap, or try moving your Detects
and Guard closer together.
False alarms
The following may cause unintended alarms:
• Pets that walk, climb or fly above 3 feet (1 m)
• Pets heavier than 40 pounds (18 kg)
• Heat sources like electric heaters, heat vents
and fireplaces
• Cold sources like drafty windows, air conditioners
and AC vents
• Curtains near windows that may move while Nest
Guard is armed
• Direct sun exposure: the front of Nest Guard and
Nest Detect should not be placed in direct sunlight
• Party balloons left unattended: they may drift into
the field of view of your sensors
• Insects that may come very close to the sensor
• Vibration or movement caused by pets bumping
Nest Guard when it’s set to Away and Guarding
• Wireless access points within 6 feet (2 m) of
Nest Detect.