28 short and one long red blinking lights on a nest 3rd gen thermostat.

[Hal]

What does this light sequence mean?  The display is blank and unresponsive to a reset. 

[GarrettDS]

Hey there Hal, 

Sorry to hear about the issues with your thermostat, I know it can be confusing with the red light, but I'm happy to look into this for you. 

I was able to find a great article that will help you with troubleshooting this issue. 

Please let me know if you have any further questions or concerns. 

Best regards, 

Garrett DS

[Hilary]

Hey there, 
Just wanted to jump in here to check to make sure that you saw our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Have a great day. 

Hilary

[GarrettDS]

Hey folks, 

It looks like we haven't heard back from the OP so I'm going to go ahead and lock the thread. If you have any further questions or concerns, feel free to create a new thread. 

Have a great day,

Garrett DS