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Nest saying will take 2 hours to cool, blowing out air but not cold

Community Member

My nest has been saying it will take 2 hours to cool from 80 to 74, but it has been 6 hours. This has never happened before. We have the gen 3, and it has been working great for the past 3 years. 


Community Specialist
Community Specialist

Hi Truong1,


Thanks for reaching out. I'd like to know more about it. Could you please provide your Nest Thermostat's power readout? Also, check your thermostat's Energy History. It might help you see what your thermostat was doing previously.


You can follow this guide:


  1. Go to your thermostat Quick View menu.
  2. Go to Settings.
  3. Look for Technical Info.
  4. Select Power.




Battery 3.926 V

Voc 37.91 V

vin 37.91V

lin 200mA (c)

Community Specialist
Community Specialist

Hey Truong1,


Thanks for providing your Nest Thermostat's power readings. It looks like your thermostat is receiving sufficient power from the wires, it also detects your C wire. Were you able to visit your thermostat's Energy History? What's in there? What type of air comes out of your vent? Is it regular or fan air? Have you set up a temperature schedule for your thermostat? If your thermostat is set to turn on or off at specific times, that could be the reason why it takes time to reach your expected temperature. Did your utility company install a box on your HVAC system that turns the system off during high demand (peak) times to save energy? 


Here’s how to see if you have an energy savings box:


  1. Check your meter (possibly near your air conditioner).
  2. Look for a small box with one or 2 lights on it (one light is red, the other is usually green).
  3. This box allows the utility company control to cycle your air conditioner off and on during certain peak times of the day.