Need to run the central fan without AC or Heating

[SRichar]

Without running the central air our basement gets extremely damp/stale. We can remedy it by placing a separate fan in our basement and blowing the air upstairs, but there really should be a system built in to allow me to run the fan only and move air more efficiently. Any idea if this is coming in an update? The guides specifically say cooling or heating needs to be on, and we do not want that.

[EmersonB]

Hi SRichar,

Thanks for reaching out here in the Community. Forced-air systems run the fan whenever they're heating or cooling. If your forced air system has a separate fan wire in your Nest thermostat's G connector, you can run the system fan when it's not heating or cooling. If not, your fan will only run automatically when your system is heating or cooling. If you have a system with a dedicated fan wire, you can manually turn on the fan with the app or your thermostat, or set a fan schedule. For example, you can set the fan to run all night and automatically turn off in the morning. Hit this link for more information and let us know how it goes.

Regards,

Emerson

[SRichar]

I read that link before posting. It says “

• However, you can only run the fan when your thermostat is set to a temperature mode (like Cool mode, for example). You cannot run the fan if your thermostat is set to Off. ”

So I would still have to set it to cool, and then change my temperature settings each time I want to actually run my ac. Not practical, useful, or helpful. 

[EmersonB]

Hello SRichar,

Thanks for getting back to us. I understand you wanted to run your fan separately from your cooling or heating system. Fan controls differ slightly depending on which thermostat you have. Select your thermostat below.

Nest Thermostat

1. Tap your thermostat's touch bar and select Fan .
2. Select how long you'd like your fan to run, then tap to confirm. 
3. Choose Start to run the fan or Cancel.
4. Your fan will turn off automatically after the time you've selected, but you can turn the fan off early by selecting Stop from the fan menu.

Nest Learning Thermostat and Thermostat E

Turn your fan on manually

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

You'll see a spinning fan icon on your thermostat's screen to let you know it's running.

Set a daily fan schedule

1. Press your thermostat ring to open the Quick View menu.
2. Select Settings .
3. Select Fan.
4. Choose Schedule.
5. Set how long you'd like your fan to run per hour, or set it to always run.
6. Select what hours of the day you'd like your fan to run. If you have a multi-speed fan, you can select a fan speed for your fan schedule.
7. Select Done to set your schedule.

Your fan will turn on automatically each day for the time and duration you've selected.

Regards,

Emerson