connection problem

[elbloke1]

code e299

[EduardoN]

Hi @elbloke1,

Thanks for contacting this community! I understand that your Nest Thermostat has this error code E299, about this error code I'd like to know more abut this, for that I'll ask you some questions:

• What is the specific model of your Nest Thermostat? Here’s a helpful article about how to identify your thermostat model.
• Which wires do you have on your system?
• Do you have a pre-existing thermostat?
• How far away is the thermostat from the router?

This error code means that the C-wire is disconnected and isn’t able to provide power. The thermostat battery will power the thermostat temporarily, but the thermostat will eventually power off for that in the meantime I recommend you the following steps that may help:

• Restart the thermostat.
  • Nest Learning Thermostat: Go to Settings > Reset > Restart.
  • Nest Thermostat: Pull your thermostat off its base > Remove both AAA batteries > Replace the batteries and press your thermostat onto the base until it clicks into place > Your thermostat will take a few moments to turn on and restart.
    

• Reinsert the C-wire:

  • Turn off the breakers > Remove > Reinsert the C-wire into the terminal.

Please feel free to share any additional details you think might be relevant.

Best regards,
Eduardo