Installation

Does my Sensi thermostat need a common wire, or "c-wire"?


The need for a common wire, or “c-wire,” depends on which Sensi thermostat model you have and your system type.


The Sensi Wi-Fi Programmable Thermostat works on most combined heating and cooling systems without a c-wire.


The Sensi Smart Thermostat also works on most combined heating and cooling systems without a c-wire, however, will require a c-wire for Apple HomeKit functionality.


The Sensi Touch Smart Thermostat always requires a c-wire.


Reference the master compatibility chart in this article to review c-wire needs.


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