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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
Amazon.com: C Wire Accessory Common Wire Kit for Most 24 VAC Thermostats (4 to 5 Wires), White (1 Pack) : Tools & Home Improvement
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Thermostat C Wire: Everything you need to know about the “common” wire – Smart Thermostat Guide
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Honeywell Home C-Wire Adapter White CWIREADPTR4001/E - Best Buy
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Sensi™ Smart Thermostat C-wire Kit
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Power Up Your Comfort: The Smart Thermostat and C-Wire Guide - Gearbrain
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How to Tell if Your Thermostat Has a C Wire - YouTube
How To Identify A Thermostat Common Wire (C Wire) & What It Does For Smart Thermostats - YouTube
Thermostat C-Wire: Everything You Need to Know
How to install Nest Thermostat on an old furnace with no C wire? - The Nomad Studio
How to install a Thermostat (C-wire adapter) - YouTube
electrical - Where should I connect the C wire in a Janitrol furnace? - Home Improvement Stack Exchange
C-Wire Thermostat question - Home - Wyze Forum
