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Nest Wiring Errors

Community Member

I am installing a Nest Thermostat at my business.

This is the 3rd one I will be installing and the others work just fine and have all the same wires.

This 3rd one gives me a couple of issues.

If I have all of the wires plugged in it says that the C is missing, but if I unplug the Rh and put the face back on the unit then is shows that the C is plugged in and the Rh is missing.

Anyone know what might be causing this issue?