Fan on a Thermostat E Item # T4000ES

BubbaV — Fri, 05 Sep 2025 16:47:02 GMT

Hello,

As of yesterday, 9/4/25, the fan seems to be running constantly. I've had the unit since 2019, I can set the control to Cool and it works fine. However, when I turn the air conditioning off, the fan continues to run. It is not blowing out cold or hot air, the fan is just running. Please help. Thank you!

Re: Fan on a Thermostat E Item # T4000ES

EduardoN — Mon, 08 Sep 2025 19:47:41 GMT

Hi @BubbaV,

Thanks for contacting this community! I completely understand that your Nest Thermostat E is constantly running even when you turn off the air conditioning. I know it can be very strange that even though it's working, it's not blowing hot or cold air. Don't worry, I'm here to help you!

To bring you the most accurate troubleshooting steps possible, I'd like to ask you some questions.

Are there fan schedules on your thermostat?
Are there heating and cooling schedules?
Is there a fan timer on your thermostat?
Is the G wire for the fan connected properly to the base plate?

Visit our Help Center to learn more about Fan control with a Nest thermostat.

Please feel free to share any additional details you think might be relevant.

Best regards,
Eduardo

topic Re: Fan on a Thermostat E Item # T4000ES in Nest Thermostats

Fan on a Thermostat E Item # T4000ES

Re: Fan on a Thermostat E Item # T4000ES