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Jumper wire basics. Most of your current thermostat's wires will be connected to your thermostat and go through the wall to connect to your HVAC system. However, some thermostats will have a jumper wire that doesn't go back through the wall to connect to your system. Instead, a short jumper wire connects 2 thermostat terminals together.
Identify a thermostat wire. You need to check your current thermostat’s wires to tell if your system is Nest thermostat compatible and which thermostat models it will work with. Remove your thermostat’s cover and enter the wires you find into the compatibility checker. The Nest app and Home app will also let you know if your system is ...
4. Remove jumper wires and save them. Jumper wires are short wires between two connectors. The Nest thermostat doesn’t need them. Keep your current thermostat, the photo of your wiring, and any jumper wires your current thermostat uses in a safe place. That way if you ever decide to move and you want to take your
Learn about the common or C wire. Nest thermostats are designed to use very little power, and in many cases they can use your system’s heating and cooling wires to get enough consistent power. But sometimes, you may need to connect a common wire (C wire) or power accessory, like the Nest Power Connector, to make your system compatible.
You can also check your system’s compatibility before purchasing a Nest thermostat with our online Compatibility Checker. Some systems may require a common wire (C wire) or the Nest Power Connector. Go to g.co/nest/cwirefor details. To check for compatibility, you only need to know the type of heating system.
Wire nuts are often used to connect the thermostat to the system wires. High voltage thermostats are usually labeled 110, 115, 120 or 240 VAC. Note: In some cases, it is possible to make a high voltage system Nest-compatible. Contact a local professional and have them install a step down transformer to 20 - 30 V.
Make sure your thermostat is set to Off mode. On your Nest Thermostat, select Settings Equipment. Select Power Connector Power test. Wait for the power test to finish, and then select Done. To confirm, select Settings Equipment Power Connector Power Status. The screen should now read “Nest Power Connector Detected.”.
There is a wire in the wrong Nest thermostat connector. There is more than one wire in a single Nest thermostat connector. There is a dehumidifier or humidifier connected to your system. A relay or transformer on your system’s control board is worn or has failed. There were recent issues or upgrades made to your home’s electrical system.
4. Remove the jumper wires or other jumper devices. If your wire connectors have 2 sets of labels, the app will ask you some questions to help you identify which label you will use. 5. Check off which wires you have and label each one with the stickers provided from the box. 6. Disconnect the old thermostat. 7.
Thermostat C wire installation or advanced HVAC setup. If you need a thermostat C wire installed, have a complex system (dehumidifier or humidifier, dual fuel heat pump, etc.), you should get a qualified HVAC professional to help. You can use Google Search to easily find and contact a HVAC technician of your choice in your area. HVAC system service