If you’ve successfully installed your Nest thermostat, but a blinking red light appears after you’ve been using it regularly for some time, there may be a problem with the thermostat wiring or another power issue. For instance, the blinking red light may show up then go away on itsown repeatedly. If your Nest thermostat screen fails to turn on when you just finished setting it up, you may not have connected your thermostat wires correctly. Your Nest thermostat wires need to be properly inserted into the base connectors for the device to function effectively. John Lewis plc, registered office: 171 Victoria Street, London SW1E 5NN. Authorised and regulated by the Financial Conduct Authority (Register no. 724309) for the purpose of introducing the credit provided by Creation Consumer Finance Ltd, registered office: Wellington Buildings, 2-4 Wellington Street, Belfast BT1 6HT.

WARNING: If you attempt to connect parts from different thermostat models, it may damage your thermostat as well as your system.In rare cases, a Nest thermostat can be damaged by issues such as a power surge from your system, connecting it to an incompatible system, or by touching exposed wires together if power to the system hasn’t been turned off during installation. Pull your thermostat off its base and remove both batteries. Make sure that nothing is between the battery and the battery terminals. Some countries (such as the UK, France, and The Netherlands) use high voltage wiring for thermostats while others (such as the US and Canada) use low voltage wiring. High voltage and low voltage thermostat parts are not compatible with each other, and should not be used together. Touch bar on the right side of the ring: also comes in different colors (Refer to the colors below). Some systems, including heating-only, cooling-only, zone-controlled, and heat pump systems, require a C wire or the Nest Power Connector. Go to g.co/nest/cwire for details.

As Boilers and radiators are installed by third parties, they do have to install in compliance with regulations and manufacturer standards to get the full benefit of the warranty. The Nest thermostat is incompatible with high voltage, millivolt, and proprietary heating systems. If you use the Nest thermostat with any of these heating systems, it may not get sufficient power to charge its battery.If your system works with your old thermostat, try getting a professional to installyour Nest thermostat.Make an appointment with our installation partner OnTech, to have a trained pro come to your home, install and set up your Nest products.If your Nest thermostat is damaged, or if you need a professional to service your system, the installer maylet you know. If there'sa help message on your thermostat or in the app, follow the troubleshooting steps in Troubleshooting Nest thermostat error codes. Other heating systems, apart from millivolt, proprietary, and high voltage systems, work properly with Nest thermostats. Google Nest thermostats look similar, and share similar software, but there are some important differences that you’ll need to know for troubleshooting, installation and more. You can look at the display, the base, or in the Nest app to find out which Nest thermostat you have. Nest Thermostat

Creation Consumer Finance Ltd is authorised and regulated by the Financial Conduct Authority (Register no. 311518). If the light blinks green and your thermostat is unresponsive for more than 15 minutes, it may have frozen during the update. To help you identify whether your heating system is a high voltage, millivolt, or proprietary, we’ll try to describe them: Nest’s sleeker and thinner Learning Thermostat will slash your energy bill and boost your Smart Home credentials. Since 2011, Nest has helped save over 4 billion kWh of energy in homes around the world, and this supremely sophisticated Thermostat can work wonders for you too. This device gets to know you, and adjusts energy usage accordingly, so you only use what you need and get a stylish home accessory to boot. All the features, such as the new Farsight display, will stun you with their bill-busting, hyper-intuitive results.

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If the display isn’t fully seated on the base, your thermostat won’t turn on and can’t charge its battery. Uninstall your Nest thermostat and reinstall your old thermostat. Make sure that the wires are placed in the right connectors.

If there's noblinking red light, it's possible that you’ve put wires into the wrong thermostat connectors. Make sure you've entered your system’s wires correctly into theapp and follow the wiring diagram it gives you. You can hire a professional installer and ask them to set up your Nest thermostat for you. The professional installer will tell you if the thermostat is faulty or needs servicing. Reach out to the Google Nest Support TeamAs this information is anonymised and aggregated it cannot be used to identify any individual user actions.