Newly Purchased 3rd Gen Nest not charging with USB or wall

[llbeans]

Am having same issue as described in the closed thread (https://www.googlenestcommunity.com/t5/Nest-Thermostats/3rd-Gen-Nest-Thermostat-No-Longer-Charging-e...) . 

Except...my Nest Learning Thermostat (3rd Gen) is recently purchased. I just unboxed it yesterday.

Took off base 12 hours ago during set up because the Nest thermostat indicating there was low battery and was shutting down so I need to charge it. Didn't think that was unusual since maybe the charge drained prior to arriving to my house.

It's been on a charger for 12 hours and still no display msg stating "To use the thermostat, attach the display to it’s base". It is blinking green and has been for the duration on the charger

Have no C-wire and am fine with that. I can handle charging the thermostat a few times a year. But I cannot even get the Nest to charge so I **can complete set up** 

Thanks for any guidance from the Nest Community

[moralesvicente]

Hello  llbeans, 

Thank you for taking an interest in our community. I’m sorry to know that your new Nest Learning Thermostat 3rd gen is not holding a charge. So don’t worry; I’m happy to help. 

I appreciate the information provided in this post. If your thermostat's battery is draining quickly, there are a few solutions. You can try adding a common wire (C-wire) to your system, which provides a dedicated power source. Alternatively, the Nest Power Connector can also provide stable power to your thermostat. While charging the thermostat can be helpful in the short term, it won't isolate the underlying situation. For your reference, check out this article: Learn about the common or C wire. 

Please let me know if these suggestions were helpful.

Best regards,

Daniel

[llbeans]

I appreciate the reply. However, the problem is not the presence or lack of a C-wire. The Nest Thermostat will not even charge on a charger to enable even the basic initial set up. Regardless of the power source, the Thermostat is not able to power on. It's not a matter of draining power.  I left it on the charger for 20+ hours.

[moralesvicente]

Hello llbeans, 

Thank you so much for keeping me updated. To continue providing further assistance, please answer the following questions: 

• When did you purchase the thermostat? 

• Where did you acquire this unit? 

In the meantime, let’s explore more troubleshooting options.

• Ensure the small connector is lined up correctly, then push it back onto the main part. When it's in the right place, you'll hear a click.

• Check if your system is getting power.

• Ensure your thermostat’s wiring configuration is fully inserted in the base plate.

• If you have your previous thermostat, try to install it and check if it works properly. 

To get more information, visit this useful article: Troubleshoot when your thermostat won’t turn on.

Let me know how it goes. 

Best regards,

Daniel

[llbeans]

Hi Daniel. I purchased the thermostat through Amazon and have decided to return it for a new unit. Something is wrong with this one. I purchased the unit the day before I installed it, a few days ago.

I did the troubleshooting items you recommended already. The old thermostat works fine. I reinstalled that when I removed the Nest. 

I had no problem getting the small connector lined up. For the few minutes that the Nest still had battery power immediately upon installing, the thermostat wiring was correct and working. Within minutes of connecting, the Nest displayed the message that the thermostat was shutting down due to low battery. Within 5 minutes, maybe less.

As I stated, the problem is not at the wall. The problem is that the Nest will not power up either on the wall **or with the charger**. It is not a wiring issue or a wall issue or a power issue. It's something to do with the battery inside the Nest (or something else within the unit itself).

I appreciate you trying to help me but after hours of trying to troubleshoot and searching on multiple websites, I've given up and going to return the unit.

[moralesvicente]

Hey llbeans, 

I appreciate your continuous communication and the effort you've put into the troubleshooting steps. I understand you have returned this device because it is not working as you expected. If you have more questions or need assistance, please feel free to write in this post.

Best regards,

Daniel