If your fan is continuously running, you may be wondering why it doesn’t seem to turn off as planned, even with a smart device like the Ecobee Thermostat connected to it.

There are a few reasons why the Ecobee may not be turning off your HVAC system’s fan:

  1. The fan is set to “On” instead of “Auto.”
  2. The minimum fan runtime or heat dissipation time needs to be adjusted.
  3. The Smart Recovery setting is activated.

In this article, we’ll review how you can troubleshoot your Ecobee Thermostat to determine why your fan will not turn off and what you can do to resolve the issue.

Check if Your Fan is Set to “On Instead of “Auto”

Although your HVAC’s fan will usually run as the air or heat circulates through the home, most homeowners don’t realize that the fan will sometimes stay on even if the air and heat are off.

The benefit of always having the fan on is that you can improve the air circulation in your home, but since this setting can add more to your energy bill and have a distracting sound, some homeowners would rather have it off.

You’ll find this particular fan setting on your Ecobee Thermostat, with an option to toggle it between “Auto” and “On.” Switching the setting to “Auto” means that your fan will only turn on while your A/C or heater runs. In contrast, changing this setting to “On” means that the fan will always run.

If you want to change your fan setting, follow these instructions:

  • Navigate to Quick Settings on your Ecobee.
  • Tap Fan.
  • Choose Auto.

However, if your fan is still running even after the A/C or heater has turned off—despite the system being set to “Auto”—there are some additional troubleshooting steps you’ll need to do.

Check Your Minimum Fan Runtime

The minimum fan runtime is only applicable if the fan setting is on Auto. This setting can be changed from 0 to 55 minutes every hour. What this setting does is set the time for the fan to run every hour on Auto.

However, if you do not want your fan to be on, you can set this to 0, and it will only run when your heating or cooling is running. If this setting is longer than your heating or cooling time, then the fan will run even if the system isn’t on.

If you want to change this runtime, follow these instructions:

  • Go to your Ecobee’s Main Menu.
  • Select System > Fan.
  • Change the new minimum runtime value as you see fit.

Check the Heat Dissipation Time

Another setting of the Ecobee Thermostat that may be running your fan more than you’d like is called the Heat Dissipation Time. This is when the Ecobee will run the fan after reaching your desired heat temperature for a while after your heater has turned off. The Ecobee does this to push out any additional heated air that may be remaining.

The default Heat Dissipation Time for Ecobee is 30 seconds but can run up to 900 seconds. So, while this won’t be the cause of your fan running constantly, it will cause your fan to run longer than you want it to.

On your thermostat, you can easily change the heat dissipation time by following these steps:

  • Go to the Main Menu.
  • Tap Settings > Installation Settings > Thresholds > Heat Dissipation Time
  • Change the time so that it is less than 30 seconds.

Check the Smart Recovery Settings

The Smart Recovery Setting is where the Ecobee learns your home temperature preferences and plans ahead. It can take the weather and your activities (how often you’re home or away from home) into account to get your home to the desired temperature before you even think about it.

However, this can cause your thermostat to run the heater or A/C when you think it shouldn’t be. It’s easy for users to assume that the fan is on, but it’s actually just your thermostat thinking ahead for you!

If you want to turn the Smart Recovery feature off, you can select the following options on your thermostat:

  • Go to the Ecobee’s Main Menu.
  • Select Settings > Preferences.
  • Select either Heating or Cooling Smart Recovery.
  • Tap Disable.

This will turn off the feature and no longer run Smart Recovery on your Ecobee.


When your Ecobee Thermostat is off, and your fan is running, you may be confused and frustrated; not to worry! Many settings may cause the fan to be turned on for longer than you’d like—but most of it is for a reason and can be easily changed.  

Is your Ecobee Thermostat not turning your fan on? Check out this article for troubleshooting tips!