Cooling temperature

[dukeandern]

My Nest thermostat is set at 70 degrees for cooling and is constantly going up to 85 degrees on my upstairs unit.  My HVAC system is only a year old so it's an issue with the nest.  Each of my five kids sleep upstairs, which is causing multiple issues due to the temperatures.  Help please!  

[CoolingWizard]

Heat rises so the upstairs will naturally be warmer.  However, the upstairs Nest thermostat is located in the common area near the air return.  Just because your system is 1-year old does not mean your system or ducts might be at fault.  Are ducts in the attic leaking? Is your return air filter plugged? Is the HVAC system properly charged with refrigerant and proper superheat attained? Turn your upstairs AC on, wait 15 minutes, then measure the air temperature at the return filter, next then put your temperature probe up inside a vent. You should get 28 to 35 degree difference. If it is much lower, you have system problem.  

AC Cooling Wizard

[zoeuvre]

Hi folks,

@dukeandern, thanks for reaching out, and I'm sorry to hear about the situation. I want to check if you managed to see the response above. Please let us know if you still have questions or concerns, as we'll be willing to assist you further. 
 

I appreciate your help, @CoolingWizard. 

Best,

Zoe

[zoeuvre]

Hi dukeandern, 

I want to check and see if you are still in need of any help. Please let me know, as I would be happy to assist and answer any questions you may have.
 

Thanks,

Zoe

[zoeuvre]

Hi there, 

We haven't heard from you in a while, so we'll be locking this thread if there is no update within 24 hours. If you run into any more issues in the future, please feel free to create a new thread.
 

Regards,

Zoe