Camoislol2,
yes indeed. This is a straight forward HAVC system. Your wires in use are:
Rc, Red wire, Power IN
Y, White Wire, Cooling Call
B, Red Wire, Power COMMON
W, White Wire, Heating Call
G, Black Wire, Blower Fan Call
In your Nest Learning Thermostat 3rd Generation box will be labels for each wire. This will help you keep the wires straight especially since you have two red wires, and two white wires.
Ken, The AC Cooling Wizard
NestPro, Google Pro, Mechanical Engineer and HVAC service company owner.
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