The best guide for correct wiring instructions is always the installation manual for your thermostat. The manual or quick start guide will have come inside your thermostat’s packaging. If you no longer have your installation manual, you can find it online on this website. Simply use the search bar to locate your product. The manuals and all supporting material can be found at the bottom of the product description page.
You can also watch one of our installation videos that include steps on how to determine the type of wiring you have in your home.
If you are still unsure if your new thermostat is wired correctly, please contact Honeywell Customer Care at 1-855-733-5465.
A C-Wire Adapter replaces the need for a C-Wire. The C-Wire Adapter is included in newer Honeywell Wi-Fi Thermostats. If you own an older thermostat model, you can purchase a C-Wire Adapter here.