Smart Home Thermostat Wire Colors

Note that colors may vary and the labeling on systems may be inconsistent.

Home thermostat wire colors. C wire blue or black common for 24 volt power to the thermostat. You use this terminal for second stage heat. Industry standard for geothermal heat pumps rh wires.

Red now there can be two separate wires for this. The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. When taking into consideration your thermostat wiring colors the orange wire typically connects to the o terminal while the dark blue wire connects to the b terminal.

Knowing what are the wire colors for a thermostat is half the battle when it comes to installing one. White the white wire is what connects to the auxiliary heat on your system. O wire for reversing valves in amana carrier ducane goodman heil janitrol lennox heat pumps may vary for othe rmanufacturers dark blue wire for reversing valves on rheem ruud heat pumps.

Y2 wire connects to y2 terminal and is for cooling stage 2. W wire white for heat. Y wire connects to the y terminal and is for cooling stage 1.

In this article we will cover different kinds of thermostats commonly seen today what challenges they pose during installation. This could happen if the wires are swapped on both ends or if there s a spice in the wire somewhere that was not matched up to the correct color. Yellow the yellow wire connects to your compressor.

This thermostat wire color code will help homeowners understand the anatomy of their thermostat. Orange this wire connects to your heat pump if you have one. It s important to note that in some cases the color of the wire does not necessarily mean it connects to that came color one the board.