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

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Availability: Only 5 left in stock, order soon!
Fulfilled by Diamond Home USA
Arrives Mar 18 – Mar 22
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Size: 1.1 x 3.03 x 3.98 (Pack of 1)


Style: Connector


Features

  • Nest Google Thermostat Power Connector (snow)FeaturesMaterial: Thermostat
  • Made In Taiwan
  • Installation is simple; the Nest Power Connector attached to your furnace air handler, or zone controller and comes with simple instructions; no wiring or drilling required
  • 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

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


Controller Type: Android, iOS, or Web


Special Feature: C-Wire Substitute


Color: Snow


Brand: ‎Google


Model Name: ‎GA02493-US


Controller Type: ‎Android, iOS, or Web


Special Feature: ‎C-Wire Substitute


Color: ‎Snow


Specific Uses For Product: ‎HVAC Systems


Temperature Control Type: ‎smart/remote


Connectivity Technology: ‎Wi-Fi


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


Power Source: ‎HVAC Powered


Voltage: ‎24 Volts (AC)


Material: ‎Plastic


Shape: ‎Rectangular


Display Type: ‎color LCD or LED


Finish Type: ‎Matte Plastic


Control Type: ‎Automatic Control


Control Method: ‎Touch


Connectivity Protocol: ‎Wi-Fi


Mounting Type: ‎Furnace/Air Handler/Zone Controller Mount


Style: ‎Connector


Backlight: ‎Yes


Specification Met: ‎General Industry Standards


UPC: ‎193575020150


Global Trade Identification Number: ‎50


Manufacturer: ‎Google


Smart Home Compatibility: ‎Smart Home Compatible


Part Number: ‎GA02493-US


Item Weight: ‎3.84 ounces


Product Dimensions: ‎0.57 x 2.12 x 2.87 inches


Item model number: ‎GA02493-US


Size: ‎1.1 x 3.03 x 3.98 (Pack of 1)


Finish: ‎Matte Plastic


Item Package Quantity: ‎1


Special Features: ‎C-Wire Substitute


Batteries Included?: ‎No


Batteries Required?: ‎No


Warranty Description: ‎1 year manufacturer.


Date First Available: May 19, 2021


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Mar 18 – Mar 22

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

    • Necessary device
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
With the directions, very easy to install. Works perfect
Reviewed in the United States on February 1, 2026 by Bryon J Goeckner
    • Solves the missing c wire - specific to the Nest thermostat, not a universal solution
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Installed a Nest thermostat on my daughter’s condo and found out she only had two wires, red and white with no possibility of running a real C wire due to plaster walls. Confirmed that the furnace had a C wire (critical) and then ordered this dongle. My application was a heat only furnace so the wiring was fairly simple. I strongly recommend that you get three of the wagu type snap-on UL approved wiring connectors unless you have screw terminations to attach to. There are two of the snap on connectors in the box but you will need three more for the furnace side . Trust me - have the connectors handy and installing this device is easy, I tried to use twist on wire nuts but the nuts would no stay on. You need to “tell” the nest thermostat that this adapter was installed during the programming phase on your phone or tablet. Do that slowly because if you miss the check box that says this device was installed the thermostat will not work and the only way to fix it is to delete the thermostat and install it as a new device. Note - This device is specifically designed for the nest thermostat. It will not work as a workaround to add a missing C wire to other thermostat brands. ... show more
Reviewed in the United States on October 4, 2023 by J. S.
    • No C wire
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
very easy to install and corrected the power error on my thermostat.
Reviewed in the United States on January 4, 2026 by doug
    • 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
    • No experience but easy install after research & safety precautions
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
This was my first time touching anything HVAC that’s not a professionally installed thermostat, and doing any electrical wiring at all. Thermostat install was a bit tedious with drywall, drilling, and leveling but straight forward, almost like hanging a tiny painting. Sucked that after install I learned I didn’t have a c-wire, needed one, and didn’t know what an c-wire is… had to figure it out and buy this. Extra $25… ok, annoyed but not mad. This adaptor “power connector” involved significantly more investigation and caution to install versus the thermostat, but once I found the right panel it was a breeze— after that took me literally 5 mins or less with a flat head (to open the furnace) and a Phillips head (to release and reattach the wires) screw driver. Made sure I could find the panel before I placed the order. Very clear and simple directions, immediately resolved the c-wire/power supply issue I was having with my new thermostat, allowing me to use a smart thermostat in my rental home without having to talk to my landlord (plus it all cost under $100 thanks to Amazon “used” options and there’s rebates available from my electricity provider). Literally can’t believe we used to have to switch between heating and cooling in the fall and spring manually… did it at my new place for a few weeks before I decided that it was worth the trouble and expense. Love that I can check and control the temp remotely from my phone. Definitely not mad that I spent the money and got the branded product bc they made it so easy. WiFi works now. ... show more
Reviewed in the United States on October 15, 2025 by A dog
    • 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
    • Exactly as advertised.
Size: 1.1 x 3.03 x 3.98 (Pack of 1) Style: Connector
Very simple to install. Great step by step instructions. Did exactly what it was supposed to do.
Reviewed in the United States on January 28, 2026 by Garry

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