Heartwarming Thermostat Wiring Diagram Colors

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Thermostat wiring diagram colors. Blue or c wires. Just take a look at the picture below the diagram. Rc red wire power 24 vac rh or 4 red wire jumpered power 24 vac w white wire for heating enable y yellow wire for cooling enable g green wire controls fan on auto the diagram shows how the wiring works.

Y2 wire connects to y2 terminal and is for cooling stage 2. Industry standard for geothermal heat pumps. 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.

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. This thermostat wire color code will help homeowners understand the anatomy of their thermostat. Y wire connects to the y terminal and is for cooling stage 1.

Rh wire connects to rh terminal. Some thermostat units have a dedicated r terminal and it. The red wire or 24 vac power lead is connected straight to the rc 4 terminals.

A majority of brands use the orange wire for the reversing valve while a small percentage use the dark blue for it. 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. Rc wire connects to the rc terminal.

You use this terminal for second stage heat. It is better to take a good up close photo of the old thermostat and what terminals the colored wiring are terminated. Basic thermostat wiring colors air conditioner systems always remember when changing a thermostat for a new thermostat to take a photo of the colors and where they go on the old thermostat or get a pencil and paper and write it down.