In order to power most of our Honeywell Wi-Fi smart thermostats, your system must contain a C-wire. Use the wiring compatibility tool below or see additional support content to confirm that your system meets the compatibility requirements. This will determine compatibility with most systems, but as wiring systems vary from home to home, there may be some exceptions.
There is an exception, specifically if you have the Round Smart Thermostat (previously known as the Lyric Round Wi-Fi Thermostat). That can be used without a C-wire in most instances. However, if you plan to link the Lyric Round to an Apple HomeKit hub, have forced air zone panel or a Taco zone value, the C-wire is required.
Congratulations, this thermostat will work with your system.
Watch the video called:
"Substitute extra wire for C-wire"
"Substitute G-Wire for C-wire"
Sorry, this Wi-Fi thermostat won't
work with your system. Click here for other thermostat options.
To help you know for sure if your system will work with the Wi-Fi thermostat, please email the following information, as this will better allow us in assisting you with an answer.