Can You Run Fan Only Without AC On Nest Thermostat?

Curious about whether you can run the fan only on your Nest thermostat? You’re in luck! In this guide, we’ll walk you through the simple steps to activate fan-only mode, helping you save energy, improve indoor air quality, and keep your home comfortable year-round. Get ready to master this handy feature and make the most out of your Nest thermostat!

Coming to the big question, is it possible to run a fan only without heating or cooling on a Nest thermostat?  And the answer is yes, you can run the fan only without ac or heat on your nest. You’ll just need to make sure that your thermostat is set to temperature mode and your device has to be turned on

Step By Step Guide to Run Fan without AC on Nest

How to run the fan without AC on  Nest Learning Thermostat and Thermostat E

  1. Turn your fan on manually
  2. Press your thermostat ring to open the Quick View menu.
  3. Select Fan Fan.
  4. Turn the ring to select how long you’d like your fan to run. 
  5. If you have a multi-speed fan, you’ll also be able to set your fan speed.
  6. Your fan will turn off automatically after the time you’ve selected.

Also read: No Fan Option On Nest Thermostat [Fixed]

How to run fan without AC on Nest thermostat

  1. Tap your thermostat’s touch bar and select Fan Fan.
  2. Select how long you’d like your fan to run
  3. Ttap to confirm. 
  4. Choose Start to run the fan or Cancel.
  5. Your fan will turn off automatically after the time you’ve selected.

Note: You can turn the fan off early by selecting Stop from the fan menu.

Read also:  Nest Thermostat Fan Won’t Turn Off [Solved]

How to set Nest fan schedule 12am to 12am

Now that you know how to run the fan independent of heating and cooling, how do you set a daily temperature for example 12am to 12am on the nest?

To set a daily schedule for your thermostat, start by pressing the thermostat ring to open the Quick View menu. From there, select the Settings icon, which looks like the Nest logo. Next, choose the Fan option.

You can then set how long you’d like your fan to run per hour, or you can set it to always run. 

Additionally, you can select the specific hours of the day during which you’d like your fan to run. If you have a multi-speed fan, you also have the option to select a fan speed for your schedule.

Once you’ve made all your desired selections, simply select “Done” to set your schedule. This way, you can have a customized daily schedule for your thermostat that meets your specific preferences and needs, without the need to copy any existing text

Read also: No Cool Option on Nest Thermostat? Here’s The Fix

How to troubleshoot a Nest thermostat fan that wont turn on

If a fan wont turn on when you turn on heating or cooling, you may have a problem with thermostat wiring.

To fix the problem, remove the display from the wall and take a look at the thermostat wiring. And If you can see a wire in the g terminal then get a jumper between the G wire/terminal and the rewire. If the fan turns on, then you could have a problem with the system wiring.

To be sure of the correct wiring for your system, you need to know the type of system then follow the required wiring for that system You can see our guide on nest thermostat wiring for different systems here.

Read also: Thermostats with fan circulate mode


Why is my Nest fan always on?

If the nest thermostat fans keep running even when heating and cooling are turned off, you probably don’t have a c wire  and you’ll definitely  need it to fix the problem. The c wire supplies your nest with consistent 24 volts.

When there is no C wire, your thermostat can have issues with controlling your system

Other times, your service technician  may have used the G wire as the c wire and twisted it on any other wire. That could also cause the fan to constantly run. The long term solutions is to add a C wire or get a nest power connector( which much easier and inexpensive or many installations)

Read also: Can You Run AC Without The Condenser Fan Running?

Why Does my Nest thermostat fan keep running on and off?

If your nest thermostat fan keeps running on and off,  this is still a problem to do with ‘no C wire’.

The solution to this problem is add a C wire or get a nest power connector. If you have c wire but your nest fan keeps  short cycling, this could be due to  thermostat incompatibility or bad thermostat wiring. Try resetting and configuring your thermostat to suit your  existing system.

Final thoughts

In conclusion, you can definitely run the fan on a nest thermostat independent of heating and cooling providing continuous air circulation. However, it’s also important to ensure your thermostat temperature mode is on.

Related: Controlling fan on Nest

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