04-18-2023 03:56 PM
I am replacing a nest thermostat with a nest learning thermostat and when I attach the new one to the wall it will not power on to finish set up. I have checked that all of the wires are inserted properly and pulled it off and connected it to a USB to make sure the battery is charged. Please advise next steps. Thanks
04-18-2023 08:01 PM
Just checking, does your cable have Common wire? Also, if you charge the Nest Learning Thermostat for 24-hours you should have enough power to complete the installation process. Can you post a picture of the Nest backplate showing the wires and their connections.
The AC Cooling Wizard
04-20-2023 09:57 PM
Thanks so much for replying. I previously had a regular nest thermostat installed, and I installed a google c wire power adapter on the ac unit last year. All was working perfectly. I am trying to upgrade to a google nest learning thermostat and it keeps telling me that there is no power to the c wire.
04-20-2023 09:58 PM
04-20-2023 10:00 PM
I can’t figure out how to move past this error so that I can see if I need to update the wire settings. Thanks!
04-22-2023 07:12 AM - edited 04-22-2023 07:13 AM
Do you have access to a multimeter so you could check power? I would check for AC power between the red wire and the C wire. Since you have a blue conductor being used for your C wire, there’s no need to have a Nest Power Adapter. Make sure that the blue wire at your attic unit is directly connected to the C terminal on the control board.
The AC Cooling Wizard
.
04-24-2023 07:55 AM
Thank you so much for taking the time to reply! We removed the power adapter and hooked up the c wire directly and it worked!!!! I appreciate you taking the time to help me fix this! Thank you, Thank you!
04-27-2023 01:13 PM
Hello folks,
I appreciate your help, @CoolingWizard.
Great troubleshooting, @Ahusted! I'm glad to hear that it's sorted out. I wanted to ensure that everything was covered here. Please let us know if you have any further questions; otherwise, we'll close the thread in 24 hours.
Regards,
Mark