“My Amazon thermostat says it requires a "C-Wire". What is a C-Wire and how do I know if I have one?”
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The C Wire is the power wire for the thermostat. If you pop your old thermostat off the wall you should be able to see if you have the wire hooked to C on your existing thermostat it’s generally the blue wire.
Sorry, there was a problem. Please try again later.Good Evening- That's a great question! A C-wire (Common wire) is a continuous power supply wire that provides 24V power to your thermostat. Here's what you need to know: What is a C-Wire: Provides constant power to smart thermostats (unlike older thermostats that used batteries) Usually a blue, black, or another colored wire Connects to the "C" or "24V Common" terminal on your HVAC system How to Check if You Have One: Remove your current thermostat from the wall plate Look for an unused wire behind the wall plate - this might be tucked back and not connected Check your HVAC control panel (furnace/air handler) for a wire connected to the "C," "24V," or "Common" terminal Count your existing wires - if you only have 4 wires (typically R, G, Y, W), you likely don't have a C-wire I hope this helps, Have a great day!
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