Nest Doorbell No Power

Is your Nest doorbell experiencing power issues?

One common reason for a Nest doorbell not powering on is an inadequate power supply.

Unlike traditional doorbells that require minimal power, Nest doorbells need 16v – 24v of power with at least 10 VA.

Most doorbell transformers should be capable of supporting these requirements, but there are instances when a transformer may not deliver enough power to the device.

Basic Power Requirements


The Nest doorbell requires a certain range of voltage to function properly. The ideal voltage range for the Nest Hello doorbell is between 16-24 volts AC at 1.5 amps, or 8-16 volts DC at 3 amps.

It is crucial to ensure that your doorbell system meets these voltage requirements for optimal performance.

Transformer Requirements

The power supplied to your Nest doorbell is often provided through a doorbell transformer.

This transformer essentially converts your home’s electrical voltage to meet the specific voltage requirements of your doorbell.

For Nest Doorbell (wired), it must be connected to a 16-24VAC, 10VA, 50/60Hz doorbell transformer.

If your house does not have existing doorbell wires or a suitable transformer, you may need to install the Indoor Power Adapter or purchase the Nest Doorbell (battery) that comes with a built-in rechargeable Li-Ion battery (6 Ah, 3.65V).

Electrical System

It is important to check your home’s electrical system for compatibility with the Nest doorbell.

  • Start by locating your doorbell and chime, typically mounted near the front door.
  • Remove your doorbell chime’s cover to inspect its wiring, ensuring proper connection, and no visible wear or damage.
  • Additionally, make sure that your home’s power supply is stable, as fluctuations in power could affect the functioning of your Nest doorbell.


Low Voltage

For your Nest doorbell to work properly, it requires a power supply of 16-24V AC and at least 10 VA.

If your doorbell is not receiving enough voltage, it may face issues such as not powering on, no chime, or poor video quality.

Ensure that your doorbell transformer has the required voltage capacity and that no other devices are causing a drop in voltage supplied to the doorbell.

Light and Chime Issues

Check for any of the following light and chime problems:

  • Yellow blinking light: Indicates a power issue. Ensure your transformer is supplying the required voltage.
  • Chime doesn’t ring or sounds weak: Some doorbell systems may not provide adequate power to the chime after Nest doorbell installation, even if the transformer is rated between 8-24V AC and 10 VA. Ensure that the 2nd gen Nest doorbell (wired) is connected to a transformer rated 16-24V AC, 10-40 VA.

Reset and Restarting

If your Nest doorbell has no power or encounters other issues, you can try the following steps:

  1. Check if the breaker is turned on and ensure the doorbell gets enough power.
  2. Press and hold the black button on the back of the Nest doorbell for factory reset or restarting.
  3. Ensure proper wiring between the Nest doorbell and your home’s doorbell system.
  4. Charge the battery manually in cold weather if your Nest Doorbell (battery) is connected to another power source but still uses battery power to work.

Wiring and Connections

Doorbell Wires

When setting up a Nest Doorbell, it’s essential to ensure that the doorbell wires are correctly connected. Clean the ends of the wires before connecting them to the Nest Doorbell wire connectors.

The connectors will secure the wires and provide power to the device. Keep in mind that it doesn’t matter which connector you attach a wire to, as long as they make a secure connection.

Switches and Breakers

Check for issues with switches and breakers in your home’s electrical system. If power is not reaching the Nest Doorbell, it could be due to a tripped breaker or a blown fuse.

Locate your home’s breaker or fuse box and verify that all switches are turned on and fuses are intact.

  • Check that the breaker is turned on, and if it’s tripped, turn it off and back on to reset it.
  • If you have a fuse box, examine each fuse for signs of damage and replace blown fuses as needed.

If your Nest Doorbell still doesn’t receive power after checking the wiring and electrical system, consider the possibility of an incompatible transformer.

Nest Doorbells may require an upgraded transformer or an indoor power adapter to function correctly.

Google Nest Hello Doorbell

Installation and Setup

The Google Nest Hello Doorbell is a smart doorbell that requires proper installation to ensure continuous power supply.

The Nest Hello doorbell requires 16-24 volts AC at 1.5 amps or 8-16 volts DC at 3 amps.

Before starting the installation, remember to switch off the power for your doorbell system to prevent any electrical accidents.

During the installation process, ensure wiring is done according to the instructions provided by Google.

If the doorbell is connected to another power source such as a battery, you may need to manually charge the battery in cold weather.

After successfully attaching your doorbell to the system, make sure to switch the power back on at the breaker box.

Testing and Compatibility

Compatibility is essential when it comes to ensuring your Nest Hello Doorbell functions without power issues.

  • Does your doorbell transformer meet the required power specifications? 16-24 volts AC at 1.5 amps or 8-16 volts DC at 3 amps.
  • Does your Nest Doorbell appear in the Nest app? If not, make sure the doorbell is plugged in, turned on, and connected to the correct source of power.
  • Try resetting the Nest Hello by turning it off, waiting for a few seconds, and turning it back on again.
  • Reset your Wi-Fi router by unplugging it and reconnecting it after a few seconds.

Alternative Solutions

Adapter and Transformers

If your Nest doorbell won’t turn on, it could be due to an incompatible transformer or lack of power.

One possible solution is to use an indoor power adapter designed for Nest doorbells.

Ensure the doorbell is properly plugged in and the outlet has power.

Transformers also play a crucial role in powering your Nest doorbell. Make sure your existing transformer is compatible with the Nest doorbell system.

If it’s not, consider upgrading the transformer. A transformer with a rating of at least 8VA is recommended for optimal performance.

Home Security Systems

In some cases, your Nest doorbell may not receive power when connected to certain home security systems.

To identify compatibility, check the specifications of your home security systems and compare it with Nest doorbell requirements.

If you discover that your home security system is incompatible with the Nest doorbell, consider updating your system or consulting with a professional for advice on integrating the two.

This will ensure that your Nest doorbell functions optimally without losing power.


In summary, resolving power issues with your Nest Doorbell can often be a simple process.

Test different outlets if the doorbell isn’t charging when plugged in, as this might be a quick fix.

Keep in mind that the Nest Doorbell requires 16v – 24v of power with at least 10 VA, and ensure that your doorbell system is switched back on at the breaker box after installation.

Occasionally, power outages may lead to the Nest Doorbell not working properly.

In such cases, removing the doorbell, disconnecting the USB cable, waiting a few minutes, and plugging it back in can help.

Additionally, check for Wi-Fi errors and make sure your Nest App is up to date.

By following these suggestions, you can effectively troubleshoot any power-related issues with your Google Nest Doorbell and ensure its reliable performance.