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Google Nest Power Connector - C Wire Adapter for Smart Thermostats - 3.98in Accessory, Snow

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Arrives Thursday, Jul 9
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Size: 1.1 x 3.03 x 3.98 (Pack of 1)


Style: Connector


Features

  • Nest thermostats are designed to work without a C wire in most homes but for some systems, including heating-only, cooling-only, zone-controlled, and heat pump systems, you'll need a Nest Power Connector or C wire.
  • The Nest Power Connector is a simple affordable alternative to a C wire if your heating and cooling system requires one to power your Nest Thermostat
  • Installation is simple; the Nest Power Connector attaches to your furnace air handler, or zone controller and comes with simple instructions.
  • The Nest Power Connector is only compatible with 24 VAC systems; it won't work with millivolt or high voltage systems
  • The Nest Power Connector is the Nest thermostat C wire adaptor that's designed specifically for Nest thermostats
  • Operating Temperature 22 to 140F (30 to 60C). Made with 46% post-consumer recycled materials.

Description

Nest thermostats are designed to work without a C wire in most homes. But some systems may require a C wire for consistent power to your Nest thermostat. The Nest Power Connector is an affordable C-wire substitute for homes that don't have one. It doesn't require any new thermostat wiring. And with simple instructions you can even install it yourself. If something is wrong with your Nest Thermostat, Google will alert you on-device, through mobile app alerts, and over email.

Brand: Google


Model Name: GA02493-US


Product Dimensions: 7.48"D x 2.1"W x 1"H


Controller Type: Android, iOS, or Web


Special Feature: C-Wire Substitute


Controller Type: Android, iOS, or Web


Additional Features: C-Wire Substitute


Specific Uses For Product: HVAC Systems


Temperature Control Type: smart/remote


Connectivity Technology: Wi-Fi


Power Source: HVAC Powered


Voltage: 24 Volts (AC)


Display Type: color LCD or LED


Control Type: Automatic Control


Control Method: Touch


Connectivity Protocol: Wi-Fi


Mounting Type: Furnace/Air Handler/Zone Controller Mount


Backlight: Yes


Smart Home Compatibility: Smart Home Compatible


Color: Snow


Shape: Rectangular


Product Style: Connector


Material Type: Plastic


Finish Types: Matte Plastic


Brand Name: Google


Model Name: GA02493-US


Included Components: Nest Power Connector, Wire connectors, Wire labels, Sticky pad, Installation Guide, Safety warranty and regulatory guide


Model Number: GA02493-US


Manufacturer Warranty Description: 1 year manufacturer.


UPC: 193575020150


Global Trade Identification Number: 50


Manufacturer: Google


Manufacturer Part Number: GA02493-US


Item Type Name: Thermostat Accessory


Unit Count: 1.0 Count


Item Dimensions D x W x H: 7.48"D x 2.1"W x 1"H


Item Weight: 3.84 ounces


Specification Met: General Industry Standards


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Jul 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Easy to install
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Works well
Reviewed in the United States on May 26, 2026 by p.j.
    • Factory reset trick
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
It's 5 star for now. My system is a little older so finding the r,y,w, was a little challenging. Don't forget to add the wires via the app. I installed the nest thermostat first before realizing thermostat needs a common wire. After installing power controller I kept getting error message. After reading around some forums I came across the tip to factory reset thermostat so I did. That seemed to do the trick. A little tricky but I thought it's I'd share this info as it may alleviate some headaches. ... show more
Reviewed in the United States on April 20, 2026 by Chris The Great
    • It works.
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Worked perfectly and I was able to avoid running a C power line to the Nest. What' stupid, is how Google doesn't tell you anything about this and the "Smart" thermostat isn't smart enough to know it isn't running your air conditioner? My Gen 4 Nest had no low battery errors, or any messages whatsoever. If you installed a Nest Gen 4, and your compressor pops on, off right after, this is what you need. ... show more
Reviewed in the United States on May 18, 2026 by MattC
    • Didn't work, had to install C wire
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Something is wrong with the Nest Power Connector's internal components, as it tries to deliver power. I'm not sure how it's supposed to work (some kind of switch?), but it does not do the same job as a dedicated C-wire. To preface, we have a baseboard radiator system with an oil furnace and a separate AC system with air handlers. Some thermostats in our house are heat only, others both AC and heat. I installed two Nest Power Connectors, one on a Nest Learning Thermostat 3rd gen and one on a Nest Thermostat. Installation was a breeze. The 3rd gen had previously been using the workaround with a G (fan) wire as a C wire with no power issues. The Nest Thermostat was newly installed. After installation, the Power Connector at the air handler for the Nest Learning Thermostat (heat and ac controller), the unit started having low power issues within 24h (screen not turning on, disconnecting from the temp sensor, wifi disconnecting). Same issue with the Nest Thermostat in the basement (heat only) with the power connector at the HVAC (a Taco 6 zone switch relay board), with power issue error messages showing up on the screen and being emailed within a week. I double checked all the connections with a multimeter, R to W and R to C both had ~27 V, and the Nest itself read enough power coming in. Unfortunately, I had to remove the devices and run a dedicated C wire (not an easy process in our house). Since installation of the C wire, the Nest Learning Thermostat has been working excellently with no issues, indicating that the Power Connector does not do its job as a replacement for an actual C wire. (The other Nest Thermostat still will not work as after a week it had another power issue, and Google Nest support did issue me a replacement device. So it's hard to judge what caused its failure.) ... show more
Reviewed in the United States on December 13, 2021 by Cramer
    • easy to install, working as expected
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Easy to wire into your furnace... and it is working like a charm... my only issue is the wire connector nuts that came with it are junk... but i used some of the ideal 2 port wire nuts and they worked like a charm
Reviewed in the United States on January 30, 2026 by Jes
    • Great
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
We needed this to connect our google thermostats to our house. Easy to install and we’ve had no issues.
Reviewed in the United States on May 9, 2026 by Sidney
    • A bit redundant
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
I purchased this for my Nest Thermostat, as my furnace only has the R and W wires, thinking this would somehow remedy the lack of a C wire. After reading the instructions for my specific scenario, the Nest document suggested I get another 24VAC transformer , which is what my existing furnace has. I put my thinking hat on and looked into converting my existing furnace transformer into a C, W and R model, vs buying an additional W and R transformer. The C wire supplies steady power, and the existing transformer does the same thing, why not just daisy chain it to the W terminal I thought. Did some more digging and you can in fact do that. In my case, there were 3 wires running into the building already, so I did the daisy chaining at the furnace. If it was just 2 wires, daisy chain the W wire to C at the thermostat. Will be returning it as it's more gimmicky than functional. If you have to buy a 24vac transformer, might as well buy a plug in one and you won't need the Power connector. ... show more
Reviewed in the United States on February 1, 2025 by Yaki
    • DIY
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Easy to install worked perfect with my nest learning thermostat
Reviewed in the United States on June 9, 2026 by Moras

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