Temp sets to 78 on its own (3rd gen nest thermostat)

[tarapellack]

My thermostat seems to set its self to a high temperature to heat even though I have every auto option off and the device locked. This is costing me hundreds of dollars in heating costs. Help!

[carl310]

How long has this been occurring? Also just curious, but did your thermostat recently update to 6.3-5? I've been experiencing issues (not the same as yours) since the update, and I've been reading some forums stating some 3rd Gen learning thermostats have been acting "wild" and some have also been bricked.

[EduardoN]

Hi @carl310,

Thank you very much for sharing this information in this community! Regarding the issues you've been experiencing since the software update for the Nest Learning Thermostat (3rd gen), I would like to know a bit more about what happened. I'm here to help you!

To help me find the best solution, I'll need to ask you a few questions:

• Are there any error messages? If so, what are they exactly?
• Is the Nest thermostat newly installed?
  
• Is your system for heating, cooling, or both?
• Have there been any recent changes to your Wi-Fi network?

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

Best regards,

Eduardo

[EduardoN]

Hi @tarapellack,

Thank you very much for sharing this information in this community! I'm sorry to hear about the trouble you're experiencing with your Nest Learning Thermostat (3rd gen). It seems that despite having all auto options off and the device locked, the thermostat is still setting itself to a high temperature. I understand how frustrating and costly this can be. Let's work together to resolve this issue.

To help me find the best solution, I'll need to ask you a few questions:

• When was your thermostat installed?
  
• When did the issue start?
• What is the software verstion of your Nest Learning Thermostat (3rd gen)?
• What other strange symptoms have you experienced since the problem started?
• Has there been any recent changes or upgrades to your HVAC system?
• What kind of HVAC system do you have (heat pump, conventional system, etc.)?
  

Visit our Help Center to learn more about Troubleshoot strange heating or cooling behavior.

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

Best regards,

Eduardo