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darrinrigo
Community Member
since ‎11-25-2021
‎12-02-2021

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C wire is orange. Y wire is black?

11-25-2021
See picture below. This is a furnace only (no AC) and I'm installing a Nest Learning (3rd Gen).I'm just not sure what to do - I thought Y was only for AC units (and should be yellow?) and I read that C wires should be blue?