Find a pro
Sit back and let a pro install your Sensi thermostat for you.
For Sensi smart thermostat or a Sensi Lite smart thermostat, a common wire (c-wire) is required for heat only systems, cool only and heat pump systems.
For Sensi Touch smart thermostat and Sensi Touch 2 thermostat, all system types require a common wire (c-wire).
Start with the first video and follow along in order until you find the solution that’s right for you.
Sensi Thermostats require a common wire to complete installation. This video will guide you in checking if you have a common wire, or an unused common wire from your previous thermostat that you can use to install your Sensi Thermostat.
If there is not an extra unused wire running from the thermostat to the furnace, and using the g-wire as a common wire is not an option, in most cases, installing a Common Wire Maker Kit is the best solution.