Stunning Thermostat Wire Colors

Attach this wire to the w terminal of the thermostat.

Thermostat wire colors. The common wire doesn t have a standard color. Additionally the common sometimes black should come from the common side of the transformer. The white wire underneath your thermostat connects to your heating system.

The white wire connects to terminal w in industry standard thermostats. The most essential colors are red green and yellow although you may find up to eight different wires in a heat pump thermostat or as few as five in a more common hot water system. Although it may seem tedious and challenging to most including novice electricians completing a thermostat replacement project in your home can be quite simple.

Orange this wire connects to your heat pump if you have one. It terminates at your air handler or furnace. When wiring each wire should be identified by what terminal s it connects to never by color.

White the white wire is what connects to the auxiliary heat on your system. If the burner does not stop hold all 3 wires together again and try another wire until the white wire is found. Yellow the yellow wire connects to your compressor.

The thermostat wire is color coded so the technician can identity which wire goes to which port on each board. After the white wire w has been identified and labeled and secured to the w terminal one of the remaining two wires will start the burner when shorted to the white w. The installer could have used any color though.

Knowing what are the wire colors for a thermostat is half the battle when it comes to installing one. Well explained tutorial on wire color codes. Green the green wire connects to the fan.