How to check the compatibility of a smart thermostat in your home | digital trends (2023)

  1. Dom
  2. Smart house

How to check the compatibility of a smart thermostat in your home | digital trends (1)

AfterSimon Shawl

You are about to be thrown into a whirlwindsmart thermostatbut you want to make sure your home is ready for it. This usually involves finding a type-C wire that provides constant power to your smart thermostat, but there are other factors that need to be set up. Let's see what you need to know.


  • How do I know if my smart thermostat is compatible?
  • Which smart thermostat is compatible with my home?
  • Do smart thermostats work in all homes?
  • How to choose a compatible thermostat?
(Video) Top 5 Smart Thermostats in 2023 👌

How do I know if my smart thermostat is compatible?

How to check the compatibility of a smart thermostat in your home | digital trends (2)

There's a lot going on in smart thermostats, and establishing compatibility may require some work. A recurring theme among all smart thermostats is the need for a common wire, or wire C. This wire provides continuous power to the smart thermostat so it can constantly run in the background. Constant operation of smart thermostats allows them to know when people are at home and when to adjust the temperature automatically.

  1. Turn off the air conditioner and furnace switch to be safe.
  2. Remove the front panel of the existing thermostat and check that the cable is connected to the c port of the thermostat.
  3. If not, unscrew the thermostat and gently move it away from the wall. Unused C-wire can be coiled. If so, you must connect the other end of this cable to the c terminal of the furnace before connecting the smart thermostat.
  4. If there is no c-wire there either, you can use g-wire instead. The only downside is that this means you won't be able to turn the HVAC fan on and off yourself. Turns on only in heating and cooling. Be sure to take a photo of your string setting before changing anything in case you need to undo.
  5. To make the swap, you have to change the position of the wire from g to c on the stove and also on the thermostat.
  6. If all else fails, smart thermostats usually come with a kit that allows you to plug the smart thermostat into a standard electrical outlet for power.

Of course, if trying electrical DIY is too daunting for you, you can always hire contractors to assess your home's compatibility and do a full installation.


  • The Nest Thermostat is the first smart thermostat that supports Matter
  • Google is partnering with ADT to launch a new smart home security system
  • The best Amazon Alexa smart speakers

Which smart thermostat is compatible with my home?

So how do you find your C string?

Smart thermostats from all major brands are versatile enough to connect to most types of home heating and cooling. Nest and Ecobee products should work. Additionally, Honeywell should work with your home. All should work even without a c-wire thanks to AC adapters. Your heating and cooling source shouldn't matter either. Heating with gas, oil and electricity is supported. Additional systems such as humidifiers and dehumidifiers can often be integrated with smart thermostats as well.

There are some exceptions that generally apply to different brands. Wires that use many large threads are usually incompatible. High voltage cables marked 120V or 240V are also incompatible with many smart thermostats. However, this shouldn't be too much of a problem since most homes use low voltage for their thermostats.

Do smart thermostats work in all homes?

Strictly speaking, smart thermostats don't work in all homes, but they do in the vast majority. You usually need a central HVAC system to install a smart thermostat.

Smart thermostats also require Wi-Fi andsmartphonefor complete control. A healthy convenience of a smart thermostat is the ability to control it remotely, something you can't do without an internet connection. You may need to relocate your Wi-Fi router or purchase a network extender to ensure your smart thermostat has a strong enough connection to your home network.

How to choose a compatible thermostat?

First, you can go through the listour favorite smart thermostatsand find one that meets your requirements. There's a chance it's compatible. To double check, individual brands have compatibility tools to make sure their smart thermostat will work in your home. These usually include a list of the wires connected to your current thermostat (see above for how to find them). Therefore, after removing the cover of the current thermostat, pay attention to the letters associated with the currently connected cables. Then visit the appropriate compatibility page to make sure you're all set.

(Video) Best Smart Thermostats 2023 [don’t buy one before watching this]

  • Nest thermostat compatibility tool
  • Ecobee thermostat compatibility tool
  • Honeywell thermostat compatibility tool

We hope this insight will make it easier for you to choose a smart thermostat. Smart thermostats can potentially reduce monthly bills by intelligently turning off air conditioning when it's not needed and using predictive engines to keep your home comfortable when everyone is home. We believe that a smart thermostat is worth the effort required to check compatibility and install.

Editor's recommendations

  • Your Google smart home devices just got a lot less talkative
  • Do smart plugs really help reduce energy consumption?
  • Top 3 smart thermostats that don't require a C-wire
  • The best smart home devices of 2023
  • The best smart lamps in 2023

How to check the compatibility of a smart thermostat in your home | digital trends (3)

Simon Shawl


Instagram Linkedin twitter E-mail

Simon publishes in the field of technology even before the release of the first iPhone. When he's not busy lighting candles for BlackBerry's past glory days, he's busy making your smart home greener. Follow him for news on battery technology, solar energy, LED lighting and smart thermostats.

  • Smart house

The best Nest thermostat deals: Save $85 when you shop today

(Video) Simple Smart Home Heating In Minutes!

How to check the compatibility of a smart thermostat in your home | digital trends (4)

Either variant of the Google Nest thermostat would be a great addition to a home equipped with the best smart home devices, but you'll have to shop around if you want to take advantage of the discount on your purchase. Nest Thermostat products are in high demand because they help families stay comfortable during the changing seasons without the need for manual adjustments while saving on electricity costs. You'll want to act fast if you want to take advantage of the best Nest Thermostat deals we've rounded up, as they can sell out at any time.
Today's best deals on Nest thermostats

Google Nest Thermostat —
Google Nest Learning Thermostat (Geek Squad Certified Refurbished) --
Google Nest Learning Thermostat -

Read more

  • Smart house

The best smart light switches for 2023

(Video) New Amazon Smart Thermostat Unboxing, Installation, Setup & Review - How to install instructions

How to check the compatibility of a smart thermostat in your home | digital trends (5)

Being able to control the lighting in your home can significantly affect your living space. Think about it: with smart lighting, you can program your lights to turn on as soon as you get home, dim them automatically when it's time to get ready for bed, or even set mood lighting for a date night with a loved one. Smart lighting systems not only save you money on electricity (no more forgetting to turn off the lights when you leave the house - a smart switch can do it for you), but they can also make your home feel more like home. For more control over the lighting in your living space, check out the best smart light switches on the market today.

Read more

  • Smart house

The best smart locks for 2023

How to check the compatibility of a smart thermostat in your home | digital trends (6)

Tired of relying on a boring traditional deadbolt lock with the required key or numeric code? Sounds like you should consider replacing it with a smart lock. Using the same basic design as a standard deadbolt lock, the smart padlock adds features such as random PIN generation, Bluetooth pairing capabilities, and even companion app control.

If it's time to upgrade your locks to protect your smart home, we've rounded up some of the best smart locks below. Check out our guide, check out the features and see what works for you. You can also browse our list of the best smart locks if you want something for your front door.

Read more

(Video) Don't buy a Smart Thermostat until You see This!


1. Looking to warm up your smart nest? Cortana-friendly Glas thermostat debuts
(Digital Trends)
2. Doorbell Transformer Voltage: Do I Have Enough Voltage For Ring or Nest?
(One Hour Smart Home)
3. Let's Review My House: This is a Google Smart Home in 2023.
(Technology Paul)
4. Amazon Smart Thermostat Manual ( How To Use Amazon Thermostat)
(One Hour Smart Home)
5. Is Google Nest Thermostat Replacing Multiple Unit and Zone Needs
6. 5 Must Have HomeKit Thermostat For Smart Home
(Smart Home 101)


Top Articles
Latest Posts
Article information

Author: Aracelis Kilback

Last Updated: 09/18/2023

Views: 5540

Rating: 4.3 / 5 (44 voted)

Reviews: 83% of readers found this page helpful

Author information

Name: Aracelis Kilback

Birthday: 1994-11-22

Address: Apt. 895 30151 Green Plain, Lake Mariela, RI 98141

Phone: +5992291857476

Job: Legal Officer

Hobby: LARPing, role-playing games, Slacklining, Reading, Inline skating, Brazilian jiu-jitsu, Dance

Introduction: My name is Aracelis Kilback, I am a nice, gentle, agreeable, joyous, attractive, combative, gifted person who loves writing and wants to share my knowledge and understanding with you.