Learn about the common or C wire - Google Nest Help
This section only applies to Nest Thermostats and Nest Learning Thermostat (4th gen). If you have a Nest Thermostat E or Nest Learning Thermostat (3rd gen or earlier), check the section “After installation and setup.” During initial setup, the app will often tell you if you should connect a C wire to your thermostat after a power test.
Nest Power Connector - Google Help
Works with the Nest Thermostat, Nest Thermostat E, Nest Learning Thermostat (3rd gen), and Nest Learning Thermostat (4th gen). How to tell which Nest thermostat you have. Note: For Nest Learning Thermostat 1st gen and 2nd gen, consult a Nest Pro. Operating Temperature –22° to 140℉ (–30° to 60℃) Certification: IP51 – Resistant to ...
Identify a thermostat wire - Google Nest Help
The Nest thermostat uses its LCD display instead of an indicator light and gets sensor information, like outdoor weather conditions, over Wi-Fi. L: The Nest thermostat doesn't need this wire. Wires labeled L can be indicator lights. The Nest thermostat uses its LCD display instead of an indicator light. G2 or GM: Requires local professional ...
Zoned system compatibility with Nest thermostats - Google Help
However, some zoned systems that require thermostat damper control aren’t compatible with Nest thermostats, while other zoned systems may need a C or common wire, or the Nest Power Connector, to be compatible.
Thermostat wire undetected, unconfigured or unspecified
If your thermostat isn’t detecting a wire, or there’s a power issue, you should check that the wire end is straight, fully inserted into the wire connector, and isn't corroded. Google Nest thermostats detect wires by testing them in 2 ways: mechanically (is a wire inserted into the connector) and electrically (electrical current on the wire).
Install your Nest thermostat - Google Help
In most homes, installing a Google Nest thermostat is an easy DIY project that takes about 20-30 min. The Nest app’s step-by-step instructions make it easy to install and wire your thermostat, so use it as your main guide.
Nest thermostat star terminal - Google Help
Nest Thermostat E and Nest Thermostat. The Nest Thermostat E and the Nest Thermostat’s star terminal also have an O/B label because it can alternately be used as an O/B connector for heat pump systems. Nest Thermostat E. Nest Thermostat. System wire. Function. Y2. Stage 2 cooling. W2. Stage 2 heating. O/B. Heat pump heat/cool changeover valve
Troubleshoot Nest thermostat help codes - Google Nest Help
A C wire or Nest Power Connector is recommended for your thermostat. Troubleshoot C wire: N261 and N411. Low power to C wire. Troubleshoot C wire: N262, N412 and N413. In extremely cold weather only: No power to Y1 wire detected (cold weather shutoff). Your HVAC system needs maintenance. Troubleshoot Y wire (extremely cold weather only) Contact ...
Troubleshoot a "No power" alert on a Nest thermostat ... - Google …
Check for wires that appear grey. This means that the wire isn't sending voltage to your thermostat. Some wires, like a C or R wire, need to send voltage to keep your thermostat powered on. If all the wires are grey, the system may be powered …
Nest thermostat information menu - Google Help
Nest Learning Thermostat/E. with C wire. Voc: 29 to 42V; Vin: 29 to 42V; lin: 100 to 200 mA; without C wire or with Power Connector. Voc: 29 to 42V; Vin: 29 to 42V; lin: 20 to 40 mA; Troubleshooting power issues. If your thermostat’s power is outside of the above specifications, you may need to troubleshoot. For example, if your Nest thermostat