cancel
Showing results for 
Search instead for 
Did you mean: 

Nest Thermostat (3rd Gen) won't stay in Eco mode

Rob19
Community Member

Hi there, I have a Nest Thermostat that doesn't stay in Eco mode reliably.  Auto-Schedule is turned off.  I even deleted the schedule I had manually entered.  When I manually put it in Eco mode, it may stay there for several days but then I find it has randomly switched to Heat on its own.  I saw another post about this (closed now) but they mentioned a factory reset (not sure how to do this).  Any advice?

5 REPLIES 5

Markjosephp
Community Specialist
Community Specialist

Hello Rob19,

 

Thank you for taking the time to let us know about your inquiry. I'd be happy to take a look into this for you.

 

If the room or indoor temperature drops below or beyond the temperature you've set on your Eco settings, heat will automatically turn on in order to maintain the temperature. Please take a look at this article to learn more about eco-temperatures and let us know if you need more help.

 

Regards,

Mark

Rob19
Community Member

Thanks for the reply, but I'm a bit confused because the article says "When you manually set your Nest Learning Thermostat or Nest Thermostat E to Eco Temperatures, it will stay in that mode and won’t automatically switch back to heating or cooling until you manually switch it to one of those modes."  I don't see why it's switching modes.  It should stay in Eco mode and maintain the minimum temp I've specified.  Could a power failure result in it changing modes?

Markjosephp
Community Specialist
Community Specialist

Hey there,

 

I get your point, Rob19. I appreciate your thoughts about this. Let's see what's going on.

 

To isolate:

 

  • Is there anyone else in your house who has access to your thermostat?
  • Did you invite them as a home member via the Google Home app?
  • Were there any instances that your thermostat went on "away" status?
    • This usually happens when you're away from your house; the app will switch to "away" status if it is enabled. Then, your thermostat will automatically switch to heating or cooling when someone comes home or if it senses motion.
  • Disable the Home and Away Assist to ensure that it won't switch modes.

 

Please observe and keep me posted on how it goes.

 

Regards,

Mark

Thanks for the continued troubleshooting.  Nobody else has access and "home and away" are disabled.  There was nobody in the house when the mode switched.

Markjosephp
Community Specialist
Community Specialist

Hi Rob19,

 

I appreciate you letting me know. Despite the fact that Eco mode ought to keep the room at a comfortable temperature, there's still another potential explanation for why the heat suddenly came on: when it was unable to maintain the temperature range. Your thermostat will therefore turn on the heating until your house warms up in order to achieve the desired temperature. Please check out the link I shared above under "How Eco-Temperatures Work" and let me know if you have more questions.

 

Thanks,

Mark