Upgrade your transformer for Nest Doorbell (wired, 2nd gen or 3rd gen)
The Nest Doorbell (wired, 3rd gen) and Nest Doorbell (wired, 2nd gen) have higher power requirements than most doorbells. For some installations, you'll need to replace the transformer for your doorbell.
If you don't want to replace the transformer, and you think you'd prefer a battery powered option, you may want to install a Nest Doorbell (battery) instead.
The best way to make sure your transformer is installed correctly is to contact a licensed electrician to install the correct transformer for you.
Requirements
Find and replace your transformer
There are a few different locations where your transformer might be. It can be near the main electrical panel, inside the doorbell's chime box, the garage, or the attic. You can follow the wiring from your chime to the transformer. A licensed electrician is best prepared to find and replace your transformer and install the doorbell for you.
If you don't have a transformer
If your home doesn't have a doorbell and transformer, here are some diagrams to show how to connect the transformer to your Nest doorbell. To make sure your transformer is installed correctly, contact a licensed electrician to install it for you.
If you don’t have a doorbell or transformer installed, and you think you’d prefer a battery powered option, you may want to install a Nest Doorbell (battery) instead.
Wiring diagrams
Here are some common wiring configurations that may apply to your home.
One doorbell, one transformer, and one chime connector
Two Nest doorbells, two chime connectors, and one chime
One Nest doorbell, one standard doorbell, and one chime
One doorbell, one transformer, and one chime connector
👁 nest doorbell and chime connection diagram
Two Nest doorbells, two chimes
👁 2 doorbells, 2 chimes diagram