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Heat/Ac won’t turn off after being turned on by Nest!!!

Pjips
Community Member

Hi please help! I’ve had nest setup And working perfectly for a couple of years now, recently out of nowhere, when you turn the heat on from my first floor nest it runs continuously regardless of the temp setting or turning off heat altogether. Once you turn it to off, the screen doesn’t show that heat is on but it continues to run all day. Tonight while troubleshooting I tried the ac which turned on right away but now won’t turn off either!!! I had to turn them off from the breaker. Any idea what could be causing this???? I’ve had 3 diff mechanics come take a look And they have no clue!

1 REPLY 1

Jeremyg
Community Specialist
Community Specialist

Hi @Pjips,

 

Thank you for posting in the community. I am sorry that you are having issues with your Nest thermostat and it is not turning off after being turned on by Nest, but no need to worry; help is here.

I need to know a few things about your thermostat in order to provide you with a better resolution.

  • What Nest thermostat model do you have? For your reference, you can check out this article on how to tell which Nest thermostat you have.
  • When did the issue first occur?
  • When was the thermostat installed?
  • Did you install the thermostat yourself?
  • What is the voltage on the red wire?
  • What is the make and model of your HVAC equipment?
  • Do you see any specific error code on the thermostat? 

I'll be waiting for your response; any additional details you can provide will be helpful.

 

Best regards,
Jeremy.