No Power Nest E Gen 1 Error E196

[docdanhl]

After 2 years of normal operation, my Nest E Gen 1 gave me a message = error low power, E196.  To fix temporarily I needed to remove the Y wire.  This worked and now running.   I need the Y wire when AC starts, what caused this after 2 years of normal function and what can be done?  Battery power reads 3.88V

[Tgarant]

I just got the same message…  weird.  The post above was 6 hours earlier. 

[EdwardT]

Hi folks,

Thanks for reaching out. I'm sorry to hear that you're having an issue with your Nest Thermostat. If you haven't yet, please try the steps on this link to isolate the issue.

Thanks,

Edward

[docdanhl]

Thanks for the reply.  I have tried the process noted in this link, and my thermostat works, but without the Y wire.  I will have to do something when I need to run the AC.  My question is why did this happen now after 2 years of use without a common wire?   

[EdwardT]

Hi docdanhl,

Thanks for the response. You'll see this code if your air conditioner has tripped a safety cut-out switch that prevents your air conditioner from turning on in very cold weather, or your system might need maintenance.

Thanks,

Edward

[Jhonleanmel]

Hi folks,

Chiming in to see if you still need assistance with this. Let us know if you have additional questions ― we'd love to help.

Best,
Mel

[Jhonleanmel]

Hi everyone,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this thread after 24 hours.

Thanks,
Mel

[docdanhl]

Question to Jhonleanmel, how do I turn the AC switch back on when needed in the spring?  Apparently this switched off and caused the power concern to the Nest.

Thanks,

Docdanhl

[Jhonleanmel]

Hi docdanhl,

You can reach out to your AC's manufacturer as this varies per unit. You could also reach out to a pro technician so they can check your entire system and wiring to make sure everything is correctly placed.

Best,

Mel

[EmersonB]

Hello everyone,

@docdanhl It's us again. I'm bumping up this thread to ensure that everything is covered here. Were you able to read the information shared above? In case you have an update, you know where to find us.

I appreciate the help, Edward and Mark.

Regards,
Emerson

[Jhonleanmel]

Hi everyone,

Just one quick final check in here since activity has slowed down. We haven't heard from you in a while so we'll be locking this thread if there is no update after 24 hours. If you have any new questions, updates or just a discussion topic, feel free to start a new thread in the Community.

Thanks,
Mel