Google T3030EX Nest Learning Thermostat 3rd Generation, White - Smart Thermostat - A Brighter Way To Save Energy, 84.0 cm*84.0 cm*32.0 cm

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Some heating and cooling systems have fans with multiple speeds. A G2 or GM wire will control the second speed of your system’s fan. If the Voc, Vin or lin values are not within the specific ranges listed here, there may be a wiring or system issue: If you have the manual for your current thermostat (or can find it online), it may describe the function associated with the B connector and help you determine if it’s meant for a heat pump wire or a common wire.

Nest Thermostat E - It’s Easy to Save Energy with Nest

In heat pump systems, the Y2 wire controls the second stage of your compressor, which can help heat or cool your home faster. High voltage systems are usually electric baseboard heating systems or other radiant systems powered by electricity.If your system only has two wires, but you have both heating and cooling, your system is likely proprietary. This wire will control your in-home dehumidifier. If your system has a dehumidifier wire, or more than one dehumidifier wire, youneed a professional installation. Systemsthat use coal, wood chips, pellets, anthracite, or other biomass materials are typically incompatible with Nest thermostats.

Nest thermostat - Google Nest Help Install your Nest thermostat - Google Nest Help

Always take a picture of your current thermostat’s wires before you remove it from the wall and install a Nest thermostat. This picture will be an essential reference to identifywires and correctly install a Nest thermostat.These articles cover the most common issues you may encounter after setting up your Nest thermostat. This is not an extensive list so if you don’t find what you’re looking for below, there are other troubleshooting articles that you can find using the search bar above.

Nest Thermostat E - White - Smart Thermostat Google Nest Thermostat E - White - Smart Thermostat

If there'sa Wiring Report or other help message on your thermostat or in the app, follow the troubleshooting steps in Troubleshoot Nest thermostat help codes.If your system works as it should with your old thermostat, your Nest thermostat may be damaged and needs to be replaced. Important: Turn off power to your system at the system switch or fuse box. This helps protect your system and thermostat from possible damage.