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FarmerAl
Community Member
since ‎10-22-2021
‎12-15-2021

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I want to install a new Nest Thermostat (07/2021 manufactured) and my system has W, Y, G, Rh & Rc wires (Rh-Rc have a jumper and one red wire connected). How do I know if I need a 'C' wire? When I did the compatibility check, I read that my 4-wire sy...
I want to install a new Nest Thermostat (07/2021 manufactured) and my system has W, Y, G, Rh & Rc wires (Rh-Rc have a jumper and one red wire connected). How do I know if I need a 'C' wire?