Why does my Nest keep saying no power?

A “No power” alert can be caused by the following: The thermostat wiring is incorrect. Your thermostat is connected to a system that requires a C or common wire, but that wire isn’t connected. Some systems, including heat-only, cool-only, zone-controlled, and heat pump systems, require a C wire or Nest Power Connector.

What is G wire on Nest thermostat?

G-wire – Fan, usually green. Y-wire – Cooling, usually yellow. W-wire – Heat, usually white.

What does G mean on Nest?

Fan relay
* Fan relay (G) is optional. However, without a G wire, Nest will not be able to control the fan independent of heating. † ​Common wire (C) not required in most cases, but strongly recommended. ‡ ​Use Rh or Rc in single transformer systems; no jumper wire required. For dual transformer systems, use Rh for the heating.

What does no power to Rc wire detected mean?

The most common reason for error code e73 / no power to Rc wire detected to appear on the Nest Gen3 display is usually due to AC outdoor unit/compressor shutting down which in turn shuts down power to the Nest thermostat.

What do I do if my Nest doesn’t turn on?

Uninstall your Nest thermostat and reinstall your old thermostat. Make sure that the wires are placed in the right connectors. Turn the power to your system back on and test that it’s working properly. If your system works with your old thermostat, try getting a professional to install your Nest thermostat.

Why is my Nest not working?

If your Nest Thermostat will turn on but you can’t control it or it’s acting sluggish, try manually restarting it and turn the thermostat off and then back on again. After an hour of charging, unhook the Nest Thermostat and reattach it to its base.

What is black wire on thermostat?

Thermostat Black Or Blue Wire (“C” Wire) The black wire or blue wire (either color is used) is the C – “Common” wire.

How do I know if my nest has power?

You’ll know your Nest Protect isn’t receiving power when the small green light at the top of the Nest button has switched off. telling you that the power is out.

What to do if Your Nest thermostat is not detecting a wire?

If your thermostat isn’t detecting a wire, or there’s a power issue, you should check that the wire end is straight, corrosion-free and fully inserted into the wire connector. Google Nest thermostats detect wires by testing them in two ways: mechanically (is a wire inserted into the connector) and electrically (electrical current on the wire).

How do I factory reset my Nest Thermostat?

Go to Settings Factory Reset . Begin thermostat setup with the Home app again. On the main screen, tap Add Set up a Nest product. Re-enter all the wires connected to your thermostat. Double check your account for any unconfigured wires. Was this helpful?

Why does my Nest Thermostat pop off the base?

The Nest Thermostat should pop off the base. Check the C terminal of the base to see if your Nest Thermostat Base has a C wire attached to it. If you have a C wire installed or have only two wires in your thermostat. Then you might need to check the fuse on your Heating and Cooling (HVAC) system.

Is the Nest Thermostat compatible with the baseboard?

Check that the radiator valves are fully open so that hot water can circulate to the radiators. Most baseboard systems are high voltage (120 V) and are incompatible with Nest thermostats. 24V baseboard systems are much less common so double check your system voltage.