What is a C-Wire?
C-wire is an abbreviation for “common wire”. Most smart thermostats today that are Wi-Fi enabled or have a color touch screen may require constant power through a thermostat C-wire. This ensures your thermostat has a continuous flow of power to function properly. It is often blue or black.
How can I tell if my home has a C-wire?
Take a look at your current thermostat's wiring by removing the faceplate. Most faceplates can be easily removed by simply pulling them from the mounting plate and checking if any wire is connected to the C-terminal. If the terminal is empty, you need to install a C-wire for the Amazon Smart Thermostat to work. Please view this article on how to Connect a C-wire Adapter to Your Amazon Smart Thermostat.
What is the best practice to wire my new device?
When removing your old thermostat, make sure to document the wiring before removal for reference when installing your new thermostat. To do this, you can use the wiring labels provided to mark the wires, use your smartphone to take a picture of your wiring (with thermostat faceplate removed), or draw a diagram to note which terminal each wire connects to.
Why is my heat pump not blowing the expected air temperature when using my thermostat?
The reversing valve on the heat pump compressor dictates whether the heat pump produces heat or cool air. If needed, you can reset the heat pump's reversing valve in the Alexa app device settings. To reset the heat pump’s reversing valve, please follow the steps to troubleshoot My Heat Pump Isn't Blowing the Correct Air Temperature with My Thermostat.
Note: If your system doesn’t have a heat pump, see Amazon Smart Thermostat Doesn't Switch on Heat or Amazon Smart Thermostat Doesn't Switch On Air Conditioning.
How do I troubleshoot a blank Amazon Smart Thermostat display?
1) The display on your Amazon Smart Thermostat might dim when inactive. You can touch the display face to activate it and see the full display. To increase the brightness, you can adjust the display settings through the Alexa app. See Change the Display on Your Amazon Smart Thermostat.
2) Ensure that all the wiring is correctly connected per the instructions in the Alexa app. If your thermostat requires a C-wire, you may need to purchase a C-wire adapter separately.
3) Verify that there is no power outage and that your circuit breaker has power. Check the furnace board for any blown fuse amps, as this could also affect the functionality of your Amazon Smart Thermostat.
What echo devices can be used as a temperature sensor with the Amazon Smart Thermostat?
Echo Dot (5th gen), Echo Dot with clock (5th gen), Echo (4th gen), Amazon Smart Air Quality Monitor.
Where can I go for additional help?
1) For additional assistance, you can reach our support team by selecting “Help and Feedback” under the More tab of your Alexa app on your mobile device.
2) To see questions and answers from other Amazon customers, click here to visit the Amazon Digital and Device Forum.
3) Visit the Learning Hub for quick video guides on installation and daily use.
4) Explore our Help Center for step-by-step troubleshooting and advanced features.
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