Honeywell Thermostat Wiring Diagram 3 Wire. Use our helpful tool to take an assessment of the existing wiring in your home. Furthermore, this thermostat wiring diagram is specifically for a system with two transformers.your system likely only has one transformer, as most typical residential systems only use a single transformer for control.
In this scenario, the power extender kit (pek) is not compatible. A wiring diagram is a streamlined standard pictorial representation of an electric circuit. Function number option number 2.
Press and hold the s and t buttons simultaneously (for three seconds) until the display appears as shown below.
The switch live wire needs to be connected to terminal b of the thermostat ; Next, let's talk about the c, or common wire. In some cases, one of those wires may be your common. Let's take a look at the g wire.