Nest thermostat fan does not run in auto

[Leroy]

Want to post for others.  Purchased a 2021 Nest thermostat. I have an oil furnace with an air handler in the attic.  Its a 4 wire system (RGYW). The fan would not run automatically when called for heat.   Manual mode worked fine.  After a couple hours of troubleshooting with the help line (the tech was very helpful), it turned out that I had to do a factory reset and select gas as the type of fuel.   That allowed the option to come up to select the auto mode for the fan.

Worked like a champ after that.  Hope this helps 

[MelbaDT]

Hey Leroy, 

Thanks for posting about your experience with our support team and the steps you've done to resolve your concern ― we're glad to hear that everything's all sorted out now. 

Feel free to reach out again if you have questions or need more help in the future — we'll always be here. 

Cheers, 

Melba

[MelbaDT]

Hey there, 

I haven't heard from you in a while so I'll be locking this thread if there is no update within the day. If you have any new issues, updates or just a discussion topic, feel free to start a new thread in the community.

Best, 

Melba

[Jcsilvera]

I have the same issue but with the a/c on. I can manually operate the fan and set it to run for a specific length of time but it won't come on or off automatically with the a/c 

[garo31hack]

I have same problem with fan not working automatically. Someone please help, thanks.

[Insane]

have same problem with fan not working on auto with a/c on.  it will work manually, but want to use the auto on feature.

[Jade2022]

I have the same issue. I did the factory reset. It worked once and then it won't work again.

[Jhonleanmel]

Hi Jade2022,

I'm sorry to hear that you're still having an issue with your Nest Thermostat. We'd like to take a deeper look into this — could you fill out this form and let us know once you're done?

Thanks,
Mel

[Markjosephp]

Hello there,

Thanks for assisting, Mel.

@Jade2022, I'm checking back in — how's it going? Have you had a chance to fill out the form? Let us know so we can assist you right away.

Regards,
Mark

[Markjosephp]

Hello Jade2022,

I'm checking back in. Were you able to fill out the form? Please let ud know if you are still having any trouble from here.
 

Thanks,

Mark

[Markjosephp]

Hi Jade2022,

I'm checking in to make sure that you've seen our response. If you have any further questions or concerns, please let us know before we lock this thread in 24 hours.

Thanks,

Mark