A c-wire is an important detail to be aware of if you’re upgrading to a new, smart thermostat. Unlike the old-school, battery-operated thermostats they’re rapidly replacing, these units incorporate intelligent technology—such as Wi-Fi connection options, a multifunctional color touchscreen display and integration into home automation systems—which requires continuous 24-volt electrical power. Short for “common wire,” a c-wire is the extra wire necessary to complete the circuit that provides that power.
Many newer homes are already pre-wired with a c-wire connected to the HVAC system. In that case, upgrading to a smart thermostat is straightforward. However, if your house (like many) isn’t, installation of the new thermostat will require a minor extra step to get it installed. Fortunately, there’s an easy way to determine right now whether you’re already “c-wired” or not.
Suppose you only see four wires. Now what? Installation of the required c-wire is a straightforward and familiar procedure for an experienced HVAC service technician. In most cases, the new c-wire will connect to the control board at your furnace or air conditioner to complete the circuit that provides continuous 24-volts for your new thermostat.
Contact Powers Heating & Air for more information about upgrading to a new smart thermostat and c-wire installation that may be required.