Flashing green light

[Brian8]

I have 5 heating zones and 5 Nest Learning Thermostats. Been working fine for over a year. All of sudden, 2 are off line, one has a flashing green light that won’t stop. Tried charging, no go. Tried holding down for 10 secs, no go. Pulled one that was working and put it on the base and everything was good. Nest is the issue, not the heater. Any advice?

[Markjosephp]

Hello Brian8,

I'm sorry to hear about the issues that you're having with your Nest thermostats that won't turn on and went offline. I'm happy to help.

It appears that your devices are having power issues. To isolate them, do they have a C wire connected? Also, did you notice any wire reports or message codes?

Please have a look at this article and let us know if you need more help.

Best regards,

Mark

[Markjosephp]

Hi there,

I wanted to see if you still needed help. Please let us know if you have any other questions or concerns.

Best regards,

Mark

[Markjosephp]

Hello Brian8,

It has been a few days since the last reply, and I am going to lock the thread in 24 hours. If you have any questions, please feel free to create a new post.

Best regards,

Mark