These terminals connect to wires that run between the thermostat and the equipment in your furnace or air handler. W2 and Y2: Secondary stages for extreme temperature demands.
Thermostat Wiring Upgrade Guide: Essential Steps for Proper Connection
G terminal: Activates the blower fan to move air through the ducts. You will often find this diagram printed on the back of the thermostat, inside the equipment cabinet, or in the installation manual.
The Basics of Thermostat Wiring Every thermostat, from basic mechanical units to advanced Wi-Fi controllers, relies on a set of terminals labeled with letters. Thermostat wires: Connect to the low-voltage side, with the R terminal acting as the hot side.
Thermostat Wiring Upgrade Guide: Understanding Terminal Functions and Wire Connections
Y terminal: Controls cooling, sending voltage to the outdoor condenser unit. W terminal: Controls heating, typically signaling a furnace burner or heat strips.
More About How thermostats are wired
Looking at How thermostats are wired from another angle can help expand the discussion and give readers a second clear paragraph under the same section.
More perspective on How thermostats are wired can make the topic easier to follow by connecting earlier points with a few simple takeaways.
