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Nest 1st Generation- E195

Milala313
Community Member

‎02-24-2025 05:48 PM

A night ago we noticed that we could a read on the app and whe. We checked the thermostat,  it gave an error code of E195.  We have tried literally everything from chaging with a USB cord, checking and restting the breaker, restarting the Wifi, checking the hvac system to see if there were any blow circuits.  Nothing helped. I don't understand why the R wire is not receiving power?!?!? Can someone help? 

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2 REPLIES 2

Milala313
Community Member

‎02-25-2025 04:27 PM

Apologies for all the typos! 

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GabrielaG
Community Specialist
Community Specialist

‎02-27-2025 01:15 PM - edited ‎02-27-2025 01:16 PM

Hi @Milala313,

 

Thanks for reaching out to the Google Nest community. I'm sorry to hear your Nest Learning Thermostat 1st gen is having the E195 error code, but there's no need to worry; I'm happy to help you right now.

I appreciate the troubleshooting steps you have done. To get a better understanding of the situation, please help me out by answering the following questions:

  • What type of HVAC system do you have?
  • When was the Nest Thermostat installed?
  • What other strange symptoms have you experienced since the problem started?
  • Can you please send me a picture of the wiring of the Nest Thermostat?

Any additional details you can provide will be helpful.

 

Regards,

Gabriela

 

 

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