Blue "C" wire is connected to "Y" on old thermostat. New thermostat has separate "C" hookup. Where does the blue wire go - "Y" or "C"? : r/Nest
Thermostat wire color guide | C Wire Guide
How to identify a thermostat wire
Amazon.com: C Wire Accessory Common Wire Kit for Most 24 VAC Thermostats (4 to 5 Wires), White (1 Pack) : Tools & Home Improvement
What's a C-wire, and why should you care? - CNET
Amazon.com: C Wire Accessory Common Wire Kit for Most 24 VAC Thermostats (4 to 5 Wires), White (1 Pack) : Tools & Home Improvement
Thermostat C-Wire: How it Works on Your Thermostat | Honeywell Home
How to Wire a Thermostat - The Home Depot
Fixr.com | Thermostat Wiring 101: How to Wire a Thermostat for Your Home
Wiring issue - no control board at Furnace for C-wire adapter - Cameras - Wyze Forum
thermostat - Where can I connect the C wire on the A/C side? - Home Improvement Stack Exchange
What does a thermostat C wire look like? - Quora
How To Identify A Thermostat Common Wire (C Wire) & What It Does For Smart Thermostats - YouTube
Cync Thermostat Wiring Configuration and Installation Guide
Thermostat Wire Color Codes You Need to Know | AireServ
Nest thermostat not seeing the C wire but it's there... | Terry Love Plumbing Advice & Remodel DIY & Professional Forum
wiring - Can I use an unused wire as a "C" wire? - Home Improvement Stack Exchange
What does a thermostat C wire look like? - Quora
How To Identify A Thermostat Common Wire (C Wire) & What It Does For Smart Thermostats - YouTube
What All Those Letters Mean on Your Thermostat's Wiring | iFixit News
What is a C-Wire or Common Wire and How do I Know if I Have One? | Sensi US
Your Complete Guide to Thermostat Wire Colors | Horizon Services
Decoding Thermostat Wiring Colors: Essential Guide for DIY Installation
Decoding Thermostat Wiring Colors: Essential Guide for DIY Installation
