Check Google Nest doorbell compatibility

If your home doesn't already have a doorbell system, here are a few options:

• Ask a professional to install your Nest Doorbell (wired). Important: In Europe and Australia, a licensed electrician must install a new transformer before they install the Nest Doorbell (wired). In the US or Canada, you might not need a new transformer. If you do need a new transformer, we recommend that a licensed electrician install it for you.
• Install a battery-powered Nest doorbell. It can run on its internal battery and doesn't need to be connected to wires for power.
• Install Nest doorbell (wired) with the indoor power adapter. You can plug your doorbell into an indoor power outlet.

Some doorbell systems have a built-in intercom, gate control, or a doorbell that's located far from your home such as an outside gate. These systems typically don't work with the Nest doorbell.

In this case, here are some options:

• Install the Nest doorbell with the indoor power adapter. You can plug your doorbell into an indoor power outlet.
• Install a battery-powered Nest doorbell so that you don't need to connect it to the system wires.

Learn how to:

• Install Nest Doorbell (wired, 3rd gen)
• Install Nest Doorbell (wired, 2nd gen)
• Install Nest Doorbell (wired)
• Install Nest Doorbell (battery)

If your chime has wires that aren't labeled T (Trans), F (Front), or R (Rear), it might be compatible. However, you should contact a local professional for installation.

You can also install the Nest doorbell with the optional indoor power adapter. This option lets you plug your doorbell into an indoor power outlet.

You also have the option to install a battery-powered Nest doorbell so that you don't need to connect it to the system wires.

Make sure that the transformer can provide enough power for your configuration. Electrical transformers are typically labeled with a voltage rating. It's usually molded or etched into the transformer's body.

Transformers can be difficult to locate. Common places for transformers include:

• Inside your doorbell chime box
• Near your breaker or fuse box
• In the basement or crawl space under your home

If the wires lead out of your chime or doorbell, you might be able to follow them to your transformer if it's installed nearby. If you’re unable to locate the transformer, we recommend that you contact a Nest professional for help.

Your doorbell system should be compatible with the Nest doorbell if your transformer is labeled anywhere within these voltage ratings:

Your doorbell system isn't compatible with the Nest doorbell if one of these is true:

• The transformer has no label.
• The voltage is above or below the range required for the Nest doorbell.

If your doorbell system is incompatible with the Nest doorbell, here are some options:

• Install a battery-powered Nest doorbell so that you don't need to connect it to the system wires.
• Contact a local pro installer to upgrade your transformer.
  In Europe and Australia, you’ll need to have a licensed electrician install a new transformer before they install the Nest Doorbell (wired, 2nd gen).
• Install the Nest doorbell with the optional Nest doorbell plug-in adapter. This option lets you plug the Nest doorbell into an indoor power outlet.

Important: To avoid the risk of shock, injury, or death, always use caution when you work with electricity. Remember, if you're uncomfortable working with electrical wiring, you can have a local professional installer do it for you.

The most accurate way to check if your doorbell system is compatible is to measure the voltage on its wires. Use a multimeter that has metal probes. "No contact" voltage testers (often shaped like a pen) may not be sensitive enough to give you a correct reading.

To check your dootbell's wire voltage:

1. Remove your current doorbell from the wall.
2. Disconnect the wires from the doorbell. The voltage can't be accurately measured while the wires are still connected to the doorbell.
3. Follow your multimeter's instructions and measure the voltage on the wires.
4. Compare the multimeter's voltage reading to your doorbell's voltage requirement in the table below.

If the multimeter's reading is within the voltage requirement, the system wiring should work with the Nest doorbell.

If the measured voltage is outside the required range, here are a some options:

• Install a battery-powered Nest doorbell so that you don't need to connect it to the system wires.
• Contact a local professional to upgrade the transformer.
• Install the Nest doorbell with the optional indoor power adapter. This option lets you plug your doorbell into an indoor power outlet.

A local pro installer or trained electrician can measure your doorbell wire voltage or upgrade your system if it's not compatible. They can also install the Nest doorbell for you. Learn how to contact a professional installer in your area.