To get a custom wiring diagram for installation, simply follow Nest app’s thermostat installation instructions. Proprietary systems aren’t compatible with Google Nest thermostats. However, some proprietary systems can be rewired by a pro installer to be compatible. Learn the basics of how to use your Nest thermostat, change settings, set temperature schedules, save energy, control it with your phone, and more. The Nest Thermostat E’s * or OB connector lets you install a heat pump, a second stage of heating, or a second stage of cooling. Systemsthat use coal, wood chips, pellets, anthracite, or other biomass materials are typically incompatible with Nest thermostats.

Nest Thermostats | Central Heating Controls | Screwfix Nest Thermostats | Central Heating Controls | Screwfix

The colors of thermostat wires often don’t adhere to industry standards, but they can sometimes provide a clue in certain situations. If yourthermostat doesn’t have a separate connector labeled C and you’re not sure what type of system you have: There are several ways to identify your thermostat wires: Take a picture of your current thermostat’s wiring Note: Nest Temperature Sensors linked to your account will remain linked after the thermostat reset.

Differences between restart and reset

Turn off power to your system at the breaker box or system switch. This will help protect your system and your thermostat from possible damage.

thermostat wire - Google Nest Help Identify a thermostat wire - Google Nest Help

If you have a heat pump, the W2 wire may control your auxiliary heat. Auxiliary heat helps heat your home when it’s too cold outside outside for your heat pump to work efficiently. The Nest app’s step-by-step instructions make it easy to install and wire your thermostat, so use it as your main guide. Refer to this article if you need extra help.Important: Professional installation is recommended for some systems since their wiring and setup can be complicated. These include: Your thermostat learns how often you walk by to help it know when to automatically switch to and from Eco Temperatures as you leave and come home. If you reset Home/Away on your thermostat, everything it has learned about when you're home or away will be reset. Whether or not there is a wire attached to it, if your thermostat has a separate connector labeled C in addition to a connector labeled B, then the wire in the B connector should be connected to the Nest thermostat’s O/B connector. Important: These are advanced troubleshooting steps. Your HVAC system uses high voltage, which can be dangerous. Make sure to turn off the power to your system completely.