Coming towards the color codes now— you can find multiple color gradings for the wiring inside the thermostat. Web common home thermostat wiring color codes. Web *old thermostat replacement: Web thermostat wiring color code for ecobee thermostat the ecobee thermostat comes with the expected rh, rc, y1, y2, w1, w2, g, o/b, and c terminals. The first is the red and black.
