Great Wire Colors On Thermostat

Blue or c wires.

Wire colors on thermostat. A majority of brands use the orange wire for the reversing valve while a small percentage use the dark blue for it. The basic heat a c system thermostat typically utilizes only 5 terminals. The red wire should always come from the hot side of the 24 volt transformer.

This depends greatly on who installed it as well as who manufactured your heating pump. Red or rc wires. Here is the industry standard thermostat wire color code used for most systems.

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. Therefore here s the color to label diagram for a typical thermostat. The red wire or 24 vac power lead is connected straight to the rc.

The yellow wire connects to your compressor. White w heat signal. Just take a look at the picture below the diagram.

The rh wire connects to the heating system. The white wire connects to your heat. If you do not know what you are doing then please call a professional.

Furthermore the wire colors on the transformer will be different than the thermostat wires. This terminal provides the connection between electricity supply and system circuitry so it is vital that this wire is connected correctly. Additionally the common sometimes black should come from the common side of the transformer.