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Why can't I set my HVAC fan to run continuously? My Nest thermostat setting is limited to 12 hours.

Community Specialist
Community Specialist

Disclaimer: This thread was migrated from our previous version of the Google Nest Community. You can continue to receive updates on your thread issue here or simply ask, browse or more in the new Google Nest Community.

Original Poster: Michael Manjerovic 


I have a Nest thermostat, basic version.  Software version 1.1-9.  I can set the HVAC fan to run for up to 12 hours.  Why can't I set the fan to run continuously like I did with my prior 15 year-old thermostat?


Community Member

I also have this problem. I just got a brand new Nest thermostat and I want the fan to run continuously to keep the air moving in our house, there is no option to do so. Did anyone ever find a solution or work around for this? 

Community Member

Did you ever find a solution to this problem? I just installed mine, and I can't figure it out.


Yes, I did finally find a solution. In the Google Home app, open the thermostat in question. Tap Settings (gear icon) and then schedules. From the drop down below the word schedules, choose fan instead of temperature. You can then set the fan to run 24 hours/day, 7 days/week in the fan schedule.

when I go to the google home app and go to settings in the drop down menu I don't see schedules . I only see general,features, services, . How do I get to schedules. Please advise


Tap on your thermostat in the app first, then tap the settings gear.

Community Specialist
Community Specialist

Hey all,


Since this thread hasn't had activity in a while, we're going to close it to keep content fresh. I did find an article with some details. If you have additional questions, feel free to submit another post, and provide as many details as possible so that others can lend a hand. Hope this helps!

Best regards,


Community Member

I am an asthmatic and have severe allergies and it's important for the fan to continuously run with the HEPA filter Merv 13 plus carbon to keep air clean 24 hours a day. Where can I switch for the fan to run continuously?