Secondary of the 24 Volt Control Transformer. In a standard thermostat wiring scheme, the "G" terminal would be connected to the __________. Fan Control. When a heat pump is operating in the defrost …

Sep 18, 2024 · The G terminal in a thermostat wiring scheme is connected to the fan control, enabling the operation of the fan when heating or cooling systems are activated. This connectivity ensures …

May 1, 2025 · The W wire is connected to your heating system. If your thermostat controls your heat, you will have a white wire. The Y wire is yellow and connects to your air conditioning compressor. …

Sep 16, 2025 · The G wire is typically connected to the fan terminal on the thermostat and the fan relay on the HVAC system. When the thermostat calls for fan operation, it sends an electrical signal …

Sep 2, 2025 · If you see wires connected to terminals labeled G1 G2 G3, you need a thermostat capable of controlling multiple fan speeds; none of our retail thermostats are compatible with this system type.

Jun 23, 2025 · Use the wiring diagram and code to attach the wires to the terminals on the thermostat that correspond to the connections on the furnace or air handler. Some thermostat models require …

The G terminal is connected to the indoor fan which circulates the air in the room. Then, carefully remove the faceplate of your thermostat and take a photo so you have an easy-to-follow wiring diagram.

To ensure proper functioning of your heating and cooling system, start by correctly identifying the terminal connections. The most common setup involves four main wires: Red (R) for power, White …

Nov 29, 2024 · The green wire (G wire) controls the fan, allowing the thermostat to signal the heating, cooling, or air circulation fan to switch on as needed. This wire is part of a common configuration for …