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What is the e wire on my thermostat?
Some thermostats have an E wire. The E wire controls emergency heating. Emergency heat is used when the HVAC system is not functioning properly (usually when the compressor is out of service).
How do I connect my nest E to the heat link?
The Google Nest Learning Thermostat is paired with the Heat Link right out of the box. If you have a Google Nest Thermostat E, scan the Heat Link’s QR code and follow the on-screen instructions to pair it. If your Nest thermostat display or Heat Link has been replaced, you can pair it again.
Where does blue wire go on nest E?
A brown wire is mostly likely a heat pump wire and should be connected to the O/B connector on the Nest thermostat. If the B wire is blue, it should most likely be connected to the C connector.
What color is E wire on thermostat?
Brown
Thermostat Wiring Color Code Chart
| Marking | Wire Color Code | Description |
|---|---|---|
| E | Brown | Emergency heat relay |
| Y | Yellow | Primary cool call relay |
| Y2 | Yellow | Secondary cool call relay |
| G | Green | Fan relay |
Is W2 and e wire the same?
W2 is generally called on based on a temperature differential between setpoint and space, outdoor temperature, or run time. W3 – This is just the next stage of heat after W2. E – Is emergency heat, usually just a way to manually drive on what would normally be the secondary form of heat without stage 1 heating.
Why is my nest not connecting?
First, reset your Nest thermostat’s network settings by navigating to Settings > Reset > Network. Next, restart the Nest thermostat itself by selecting Settings > Reset > Restart. Once the thermostat is up and running again, try to reconnect to your Wi-Fi network by navigating to Settings > Network.
What color wire goes where on a thermostat?
This is the most typical thermostat wiring style, and it applies to systems that regulate both heat and air conditioning. The wires are typically arranged as follows: red for 24-volt hot, white for heat, yellow for cooling, green for the fan, and blue for common (although the common wire may be a different color).
Does Nest thermostat E work without C wire?
The Nest thermostat contains a rechargeable lithium ion battery. In a system with a C-wire, the Nest charges itself from the C-wire’s current and all is fine. In a system without a C-wire, though, Nest recharges its battery when the heating or cooling runs.
Does Nest require common wire?
With a Nest Thermostat E or Nest Learning Thermostat, you’ll need to install a C wire if the thermostat has power issues or its battery often drains.