A Nest Doorbell (wired, 2nd gen) that shows offline in the Google Home app is nearly always a network or power matter, and the community threads give the common patterns. After a power outage, the doorbell may fail to reconnect until both it and the router are restarted. After a router or Wi-Fi password change it needs setup again. After a factory reset it shows offline until you remove it from the app. If it drops offline repeatedly, the signal at the door is weak: a router or mesh node closer to the door, or moving from 5 GHz to 2.4 GHz for range, is the usual fix.
A wired doorbell that used to work and now will not connect has often lost its power quality, so check the transformer too.
Differential
Likely causes of “Nest Doorbell (wired, 2nd gen) is offline or unavailable”, and how to tell them apart
- 1
A power outage
What separates it The doorbell was fine until the lights went out
How to confirm Restart the router and cycle the doorbell's power
- 2
A changed Wi-Fi network or password
What separates it The doorbell stopped after a router change
How to confirm Run setup again to give it the new details
- 3
A weak signal at the door
What separates it The doorbell drops offline repeatedly
How to confirm Move the router or a mesh node closer, or use the 2.4 GHz band
- 4
A stale entry after a reset
What separates it The app shows offline after a factory reset
How to confirm Settings, Remove device, then set it up again
- 5
A weak transformer
What separates it The doorbell reboots and goes offline
How to confirm Check the transformer rating
Before you touch a setting
Record this first — changing settings destroys the evidence
- Whether a power cut or router change preceded it
- The signal strength at the door
- Whether it has been reset
- The transformer rating
Try in this order
0 of 6 completedRestart the router
ReversibleUnplug it for thirty seconds.
Cycle the doorbell's power
ReversibleUnplug the adapter for ten seconds or use the breaker.
Check the signal
ReversibleTest Wi-Fi strength at the door with a phone.
Re-run setup after a network change
ReversibleAdd the device again.
Remove a stale entry
ReversibleSettings, Remove device.
Check the transformer
ReversibleIf it reboots.
Model-specific
What is true of this model and not of its siblings
- The outage pattern
- Owners describe the 2nd gen failing to reconnect after a power outage.
- Range
- The door is often the farthest point from the router.
- A clean test
- Take a phone to the door, join the same Wi-Fi and open a video or a speed test. If the phone struggles there, the doorbell will; if it is fast, the problem is power or the doorbell's setup.
- Why outages cause offline status
- After a power cut the router and the doorbell start together and the doorbell may try to join before the router is ready; restarting the doorbell after the router is up fixes it.
Stop boundary
When this stops being a self-service repair
- !If it stays offline after power and router restarts, contact Google Nest support
- !If it drops often with a strong signal, check the transformer
- !If it will not set up again, see the setup page
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why is my Nest Doorbell offline?+
Common causes are a power cut, a router change, a weak signal and a stale entry after a reset.
It will not reconnect after a power outage. What now?+
Restart the router and cycle the doorbell's power.
How do I improve the signal?+
Move the router or add a node closer, or use 2.4 GHz.
Should I reset it?+
Only if restarts and setup do not work.
How long should I wait before concluding the doorbell is offline?+
A few minutes after a power cut; if it is still offline, restart the router first and the doorbell second.
Does being offline stop it ringing?+
The chime on the wiring may still ring, but video, alerts and the app will not work.