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Nest Gen 3 not turning in A/C or Heat once temperature is reached.

Darkdeepsea
Community Member

I set the A/C to 73. It shows the temp in the room is 74 and the A/C is not on. It will come on at 75 which is NOT 73. Same issue with the heat. A difference of two degrees past the set point is required to kick on the A/C or heat? I have a Nest Gen 3 silver dial thermostat. Factory reset and wifi update all done. Wtf? Also, no way to calibrate the temperature sensor in the unit. Yes I have a C wire and nothing is wrong with the battery or wiring. My old Honeywell did not do this. This is an expensive product for this to act in a different way than intended.

3 REPLIES 3

zoeuvre
Community Specialist
Community Specialist

Hi Darkdeepsea, 

 

Uh-oh! I'm sorry to hear about the frustration you're experiencing with your Nest Learning Thermostat 3rd generation. It's certainly frustrating when the temperature readings and activation thresholds don't align with your settings. A few questions: 

 

  • Are you located in North America or Europe? 
  • Is the Nest Thermostat newly installed?
  • Did you use the Compatibility Checker tool to confirm the thermostat's compatibility. 
  • Does the thermostat screen indicate that it’s actively calling for heating? 
  • What type of furnace do you have? (gas, electric, etc.)
  • When did heating last work? 
  • Did heating ever work with the Nest Thermostat? 
  • Did the heating work with the previous thermostat? 
  • Did you turn off the power to the HVAC system? 
  • Did you recently turn off any breakers?
  • Have you recently experienced a brownout or blackout? 
  • Is there a light switch near the heater that controls an outlet? 
  • Did you select the correct fuel type? 
  • Do the LED lights blink on the HVAC control board? If yes, locate the light. 
  • When was the last time you changed the furnace's air filter? 
  • Have you experienced extremely cold weather lately?
  • Is this the first notable temperature drop of the year in the area?

 

I'll look forward to your response. 

 

Best,

Zoe

Hi Zoe,

SOLVED I figured it out. There are integers between the degrees. Like 70, 70.25, 7.5,7.75,71. You have to dial it to 69 then 70 to make sure it's not in a quarter, half or three quarter degree.  The app doesn't have this feature. I'm in the U.S. 

zoeuvre
Community Specialist
Community Specialist

Hi there, 

 

I'm glad that everything has been sorted out, and I appreciate your sharing the steps you took to resolve this case. If you have questions or concerns in the future, feel free to start a new thread, and we'll be happy to help.

 

Regards,

Zoe