Operation Manual

If you have one of these systems, you should get help from a Nest Pro installer.
Incorrect settings will cause unexpected HVAC activity or equipment damage.
What is Pro Setup?
If the Nest Thermostat detects any issues with your wiring, you’ll see wiring errors
here. You could get an error if a wire wasn’t inserted correctly, is missing, or dead (a
dead wire isn’t connected to anything on the other end).
You’ll need to resolve any wiring errors before your Nest Thermostat can control your
heating and cooling system.
What should I do if I get a wiring error during setup?
Once your Nest Thermostat has confirmed your wiring, it’ll ask some questions that
are tailored to your heating and cooling system.
Conventional heating and cooling systems
If you have a conventional heating and cooling system, you’ll be asked a series of
questions about the fuel source for your heat and how that heat is delivered. What
questions you’re asked depend on the wires you’ve connected.
The fuel source refers to the fuel used by your heater to generate heat. The Nest
Learning Thermostat uses this information to determine when and if it should engage
the fan when heating your home. You’ll need to select one of the following:
• Gas
• Electric
• Oil
• Propane (LP)
• Geothermal
• I don’t know
If you select “I don’t know,” the Nest Thermostat will engage the fan as soon as
heating starts. You can always go back later to change it in SETTINGS >
EQUIPMENT.
You may also be asked whether you have a forced air, in-floor radiant, or radiator
system. For more details about these types, see the article below.
What type of heating do I have?
Heat pumps