Quote:
Originally Posted by chuckster57
More often than not, thermostat wire is 7 wire. If all colors are not used, just switch to a different color.
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And add a piece of tape on both ends marked with the original wire color. That way, next year when you or a serviceman notices that the "orange wire is disconnected" it'll make sense when the tab says "ORANGE" on the white wire that is connected..... BTDT many times. The future will thank you for keeping things clear.