Nest c Wire not working

[Tbilisi79]

I ran a 24 v transformer to my Nest, it sees that its plugged in C but is in red, meaning not working. 

What am I doing wrong??

[Markjosephp]

Hello Tbilisi79,

Thanks for reaching out with your concern about your Nest Thermostat. I understand the importance of having a properly functioning heating and cooling system, and I appreciate the opportunity to assist you.

To better assist you, I'd like to gather more information about your setup. Please provide details such as the specific model of your Nest Thermostat, the wiring configuration, and any other relevant information about your HVAC system.

Additionally, consider the following troubleshooting steps:

1. Ensure that the wiring is correctly connected to both the thermostat and the 24V transformer.
2. Confirm that the transformer is providing a stable 24V power supply.
3. Double-check the compatibility of your Nest thermostat with your HVAC system.

I'll look forward to your response.

Best regards,
Mark