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Preheating too early

zunkman
Community Member

I have my Nest Thermostat set to raise the temp from 72 to 74 at 1:00 PM.  I have Early On set to a maximum of 1 hour.  It has worked fine for over a year.  Today, the thermostat turned on the furnace (forced air / gas) at 11:00 AM, which is 2 hours early. The house was 74 within 20 minutes.  I have not changed any settings for at least 3 months. Why is this happening?

I have owned some manner of Nest Thermostat for many years, so I know and have checked all the settings that could affect this behavior.  The only thing I can't check is the software, which I have to assume is the culprit in this case.

I know I can reset the thermostat, or I can Factory Reset it, but I'd like to know why this is happening.  I will keep an eye on it for a few days to see if this problem is duplicated.  But, until then, hoping for some explanation,

Thanks

Zunkman

2 REPLIES 2

AxelD
Community Specialist
Community Specialist

Hi zunkman,

 

Sorry to hear about this situation with your Nest Thermostat. No worries, help is here! Here you have some troubleshooting steps that might help to solve it:

 

1. You may have a schedule but you aren't aware. Perform a Reset only on  the schedules:  

 

  • Go to Settings Nest settings icon > Reset > Schedule
  • Follow the instructions on the screen

2. Check if the Auto-Schedule is ON. You can turn it off, so your thermostat won't make any changes by itself.

 

3. Perform a Factory Reset on the thermostat:

 

  • Go to Settings Nest settings icon > Reset >  All Settings

Let me know how that works.

 

Regards,

Axel.

zunkman
Community Member

Hi AxelD, thanks for the response.

Allow me to preface my answer by saying that I am an IT Specialist, and I always check the obvious (and more) before asking for help.

1) My schedules are fine.  I programmed and checked them many times.

2) Auto schedule is off. It has been off since I installed my thermostat 15 months ago.

3) Factory reset is far down the list of absolute last resorts for me.  I have many routines and automations that depend on my Nest Thermostat, and a Factory Reset of the Thermostat would require literally days of re-adjusting those routines and automations.

If it's any help, based on my logs, this behavior started on April 1 (No Fooling).  There was an obvious change to the way the logs are recorded starting on that date.  Was there a software update around that date?

Again, thanks for your suggestions, but I firmly believe it is a software issue.

Dan