This guide walks you through installing a Nest Doorbell with two chimes for whole-home alerts. You’ll learn wiring tips, setup steps, and how to avoid common mistakes.
Key Takeaways
- Check compatibility first: Ensure your existing doorbell transformer and wiring support the Nest Doorbell and dual-chime setup.
- Turn off power safely: Always shut off the circuit breaker before working on electrical components to prevent shocks or damage.
- Use the right tools: A voltage tester, screwdriver, wire strippers, and drill are essential for a smooth installation.
- Install the chime connector correctly: The Nest Chime Connector enables wireless chimes and must be wired properly to your existing chime box.
- Test both chimes after setup: Confirm that both indoor and outdoor (or secondary) chimes ring when the doorbell is pressed.
- Use the Google Home app: Complete setup, customize settings, and manage notifications through the app for full functionality.
- Troubleshoot common issues: If chimes don’t ring, check wiring, Wi-Fi signal, and transformer voltage.
How to Install Nest Doorbell with 2 Chimes: A Complete Step-by-Step Guide
So, you’ve decided to upgrade your home with a smart doorbell—specifically, the Nest Doorbell—and you want it to ring in two different locations. Maybe you have a large house, or perhaps you want the chime to ring both inside and outside, like in a garage or backyard. Whatever your reason, installing a Nest Doorbell with two chimes is totally doable, and this guide will show you exactly how to do it—safely and correctly.
In this comprehensive how-to, you’ll learn everything from checking your home’s compatibility to wiring the chime connector and setting up the Google Home app. We’ll cover tools you’ll need, step-by-step instructions, pro tips, and troubleshooting advice. By the end, you’ll have a fully functional smart doorbell system that alerts you wherever you are in the house.
Let’s get started!
What You’ll Need Before You Begin
Visual guide about How to Install Nest Doorbell with 2 Chimes
Image source: storage.googleapis.com
Before you grab your drill and start unscrewing your old doorbell, it’s important to gather the right tools and materials. Rushing into the installation without preparation can lead to frustration—or worse, electrical hazards.
Here’s a checklist of what you’ll need:
- Nest Doorbell (wired version) – Make sure you have the correct model (e.g., Nest Doorbell (2nd gen) or Nest Doorbell (battery) with wired adapter).
- Nest Chime Connector – This small device allows you to connect wireless chimes to your existing doorbell system. It’s essential for adding a second chime.
- Two chimes – One is typically your existing mechanical or digital chime. The second can be a Nest Chime (sold separately) or a compatible wireless chime.
- Screwdriver set – Both flathead and Phillips head may be needed.
- Wire strippers – To safely expose fresh wire ends.
- Voltage tester – To confirm power is off and check transformer output.
- Drill and drill bits – For mounting the doorbell bracket.
- Level – To ensure your doorbell is straight.
- Pencil or marker – For marking drill holes.
- Smartphone or tablet – To download and use the Google Home app.
- Wi-Fi network – The Nest Doorbell requires a 2.4 GHz Wi-Fi connection (5 GHz is not supported).
Having everything ready will save you time and prevent mid-installation trips to the hardware store.
Step 1: Check Compatibility and Power Requirements
Not all homes are ready for a Nest Doorbell out of the box. Before you start, you need to verify that your current doorbell system can support the Nest Doorbell and two chimes.
Check Your Doorbell Transformer
The Nest Doorbell (wired) requires a transformer that provides between 8V and 24V AC and at least 10VA (volt-amperes) of power. Most older homes have transformers that meet this, but it’s worth checking.
To find your transformer:
- Look inside your doorbell chime box (usually located in a closet, basement, or utility room).
- You’ll see a small metal or plastic box with wires connected to it—that’s the transformer.
- Check the label for voltage and VA rating.
If your transformer is below 8V or under 10VA, you may need to upgrade it. A weak transformer can cause the Nest Doorbell to malfunction or not work at all.
Test Existing Wiring
Use a voltage tester to check the wires at your current doorbell button. Turn off the power at the circuit breaker first, then remove the old button and test the two wires. You should see a reading between 8V and 24V AC.
If there’s no voltage, your wiring may be damaged or the transformer faulty. In that case, consult an electrician.
Confirm Chime Compatibility
The Nest Doorbell works with most mechanical and digital chimes. However, if you’re using a very old or unusual chime system, it might not be compatible. Google provides a compatibility checker on their support site—use it to double-check.
Also, remember: the Nest Chime Connector is required to add a second chime. It bridges your existing chime and allows wireless chimes (like the Nest Chime) to ring.
Step 2: Turn Off the Power
Safety first! Working with electricity can be dangerous if you’re not careful.
Locate Your Circuit Breaker
Find the breaker that controls your doorbell circuit. It’s often labeled “doorbell,” “chime,” or “front door.” If you’re not sure, turn off breakers one by one and test the doorbell until it stops working.
Turn Off the Power
Switch the breaker to the “OFF” position. Then, use your voltage tester at the doorbell wires to confirm there’s no power. This step is crucial—never skip it.
Pro tip: Place a piece of tape over the breaker switch with a note like “Do not turn on – working on doorbell.” This prevents someone else from accidentally restoring power while you’re working.
Step 3: Remove the Old Doorbell
Now that the power is off, it’s time to remove your existing doorbell button.
Unscrew the Old Button
Use a screwdriver to remove the two screws holding the doorbell button to the wall. Gently pull the button away from the wall—you’ll see two wires connected to the back.
Disconnect the Wires
Loosen the terminal screws and remove the wires. Don’t let them fall back into the wall. You can tape them to the wall or hold them with a clip to keep them accessible.
Inspect the Wires
Check the wire ends. If they’re frayed, corroded, or too short, use wire strippers to cut off the damaged part and expose about 1/4 inch of fresh copper. This ensures a solid connection.
Step 4: Install the Nest Doorbell Mounting Bracket
The Nest Doorbell comes with a mounting bracket that secures the device to your wall.
Position the Bracket
Hold the bracket against the wall where you want to install the doorbell. Use a level to make sure it’s straight. The ideal height is about 48 inches from the ground, so it’s visible to visitors but out of reach of small children.
Mark the Screw Holes
Use a pencil to mark where the screw holes will go. If you’re drilling into brick, stucco, or concrete, you’ll need a masonry bit and wall anchors.
Drill and Secure the Bracket
Drill pilot holes, then screw the bracket into place using the provided screws. Make sure it’s tight and secure—the doorbell will be hanging from it.
Step 5: Connect the Wires to the Nest Doorbell
Now it’s time to connect your doorbell wires to the Nest Doorbell.
Thread the Wires Through the Bracket
Feed the two doorbell wires through the center hole in the mounting bracket.
Attach the Wires to the Doorbell
The Nest Doorbell has two terminal screws labeled “Front” and “Trans.” It doesn’t matter which wire goes where—just connect one wire to each terminal and tighten the screws.
Pro tip: If the wires are too short, you can use wire nuts to extend them with spare low-voltage wire.
Attach the Doorbell to the Bracket
Slide the Nest Doorbell onto the bracket until it clicks into place. Give it a gentle tug to make sure it’s secure.
Step 6: Install the Nest Chime Connector
This is the key step for enabling two chimes. The Nest Chime Connector allows your existing chime to work while also triggering a second wireless chime.
Locate Your Chime Box
Go to the room where your doorbell chime is installed—usually a hallway, closet, or basement.
Remove the Chime Cover
Unscrew the cover of your chime box to expose the wiring inside.
Identify the Wires
You’ll typically see three wires:
- Front – From the front doorbell
- Trans – From the transformer
- Rear – From a rear doorbell (if you have one)
If you only have a front doorbell, you’ll see “Front” and “Trans.”
Disconnect the Front Wire
Loosen the screw on the “Front” terminal and remove the wire.
Connect the Chime Connector
The Nest Chime Connector has three terminals: “Front,” “Trans,” and “Chime.”
- Connect the wire you just removed (from the doorbell) to the “Front” terminal on the connector.
- Connect the existing “Trans” wire to the “Trans” terminal on the connector.
- Connect a new wire from the “Chime” terminal on the connector back to the “Front” terminal on your original chime box.
This setup allows the Nest Doorbell to send a signal through the Chime Connector, which then triggers both your existing chime and any wireless chimes paired to it.
Secure the Connector
Use electrical tape or a cable tie to secure the Chime Connector inside the chime box. Make sure no bare wires are exposed.
Replace the Chime Cover
Put the cover back on the chime box and tighten the screws.
Step 7: Set Up the Second Chime
Now that the Chime Connector is installed, you can add your second chime.
Choose Your Second Chime
You can use:
- A Nest Chime (sold separately) – This is the easiest option and pairs seamlessly with the Chime Connector.
- A compatible wireless doorbell chime – Some third-party chimes work, but check compatibility first.
Plug in the Second Chime
Place the second chime in the desired location—like a bedroom, garage, or backyard patio. Plug it into a power outlet.
Pair the Chime with the Connector
Follow the instructions that came with your Nest Chime or wireless chime to pair it with the Chime Connector. This usually involves pressing a button on both devices until they sync.
Once paired, both chimes should ring when the doorbell is pressed.
Step 8: Restore Power and Test the System
You’re almost done! Now it’s time to turn the power back on and test everything.
Turn On the Circuit Breaker
Go back to your electrical panel and flip the breaker back to “ON.”
Wait for the Doorbell to Power Up
The Nest Doorbell will take a minute or two to boot up. You’ll see a light ring on the front—it will pulse yellow during setup.
Test the Doorbell
Press the doorbell button. You should hear:
- Your original chime ring
- Your second chime ring (if properly paired)
If both chimes sound, congratulations—you’ve successfully installed your Nest Doorbell with two chimes!
Step 9: Complete Setup in the Google Home App
The final step is to connect your Nest Doorbell to your Wi-Fi and customize settings using the Google Home app.
Download the Google Home App
If you haven’t already, download the Google Home app on your smartphone or tablet (available on iOS and Android).
Sign In or Create an Account
Use your Google account to sign in.
Add the Nest Doorbell
Tap the “+” icon in the app, then select “Set up device” > “New device.” Follow the on-screen instructions to scan the QR code on your Nest Doorbell.
Connect to Wi-Fi
Choose your 2.4 GHz Wi-Fi network and enter the password. The doorbell will connect and update its software if needed.
Customize Settings
Once connected, you can:
- Adjust motion and sound detection zones
- Set up notifications
- Enable HDR and night vision
- Create activity zones
- Set quiet hours
You can also test the chime volume and sound directly from the app.
Troubleshooting Common Issues
Even with careful installation, problems can happen. Here’s how to fix the most common issues.
Chimes Don’t Ring
- Check wiring: Ensure all connections at the doorbell and chime box are tight.
- Verify power: Use a voltage tester to confirm the transformer is working.
- Test the Chime Connector: Make sure it’s properly wired and paired with the second chime.
- Reset the Chime Connector: Unplug it for 10 seconds, then plug it back in.
Only One Chime Rings
- Make sure the second chime is powered and within range of the Chime Connector.
- Re-pair the second chime using the manufacturer’s instructions.
- Check for interference from other wireless devices.
Nest Doorbell Won’t Connect to Wi-Fi
- Ensure you’re using a 2.4 GHz network (not 5 GHz).
- Move your router closer or use a Wi-Fi extender.
- Restart the doorbell by holding the button for 10 seconds until the light ring turns red.
Doorbell Keeps Rebooting
- This usually means insufficient power. Upgrade your transformer to one that provides at least 16V and 20VA.
- Check for loose wires or short circuits.
Poor Video Quality or Delayed Alerts
- Improve your Wi-Fi signal strength near the doorbell.
- Reduce interference by moving cordless phones or microwaves away from the doorbell.
- Update the Google Home app and doorbell firmware.
Pro Tips for a Smooth Installation
- Label your wires before disconnecting them—use tape and a marker to avoid confusion.
- Use a stud finder if mounting on wood siding to avoid drilling into a stud.
- Install the second chime in a central location for maximum coverage.
- Keep the Nest Doorbell clean—wipe the lens monthly with a microfiber cloth to maintain video quality.
- Enable two-factor authentication on your Google account for added security.
Conclusion
Installing a Nest Doorbell with two chimes might seem complex at first, but with the right preparation and step-by-step guidance, it’s a project most homeowners can tackle in under two hours. By following this guide, you’ve not only upgraded your home’s security and convenience but also ensured that you’ll never miss a visitor—no matter where you are in the house.
Remember: safety comes first. Always turn off the power, double-check your wiring, and don’t hesitate to call a professional if you’re unsure about any electrical work.
With your new smart doorbell system in place, you’ll enjoy crystal-clear video, instant alerts, and the peace of mind that comes from knowing your home is protected. Welcome to the future of doorbells!