Nest Learning Pro 3 low battery

[Jasonj72]

Indicates low battery preventing me from connecting to wifi. I tried charging in usb port but doesn’t help.  Before it ran low on battery I had heat working but AC was turning on and off every 5 minutes. I have no c wire - previous thermostat had a jumper.  I understand the nest has an internal jumper. Do I have something wired wrong that it is not utilizing it?

[RenzJ]

Hi Jasonj72,

Thanks for reaching out to the Google Nest community. We’re sorry to hear you're having this issue. Let’s look deeper into this. Please answer the following:

1. Are you from North America or Europe?
2. What type of Nest Thermostat are you planning to have?
3. When did the issue start to happen? 
4. Do you have a multimeter?

Also, let's gather power readings of your Nest Thermostat. Follow the steps below:

For the Nest Learning Thermostat and Nest Thermostat E:

1. Press the thermostat ring to bring up the Quick View menu.
2. Turn the ring to Settings and press to select.
3. Turn the ring to Technical Info and press to select.

For the Nest Thermostat 2020:

1. Tap the touch bar to bring up the Menu view.
2. Slide your finger down to Settings, then tap to select.
3. Slide your finger to Equipment > Power Info.

I look forward to your response.

Best,

Renz

[Jasonj72]

Renz - thank you for you help.  Here are my answers...

North America

I have a Nest Learning Pro 3 thermostat

I did learn that the Nest draws power through the fan wire and because I had the fan running continuously that this was causing the thermostat to have a low battery issue.  I have now disabled the fan, the Nest has sufficent charge.  The issue that I still have is that when the air conditioner runs, it short cycles...it will run for about 2 minutes and then the condenser will stop and only the fan will run.  After 5 minutes, it starts up again and runs for just a minute or two, instead of running continuously.  

Power details:

Battery: 3.699V

Voc: 35.25V

Vin: 24.96V

Iin: 20 mA(i)

[RenzJ]

Hello Jasonj72,

Thanks for getting back to us and for sharing additional information. Let's check this further. Based on the power reading you shared, the VIN is quite low, the voltage reading for it should be around 29 to 42 volts. Check your HVAC air filters if they're dirty, clean them, and observe if the issue persists.

Also, if I may ask, when did the issue start to happen?

Keep us posted.

Regards,

Renz

[Jasonj72]

I changed the filters just last week.  This has been an issue since I installed the Nest only 3 weeks ago.

[RenzJ]

Hey Jasonj72,

Thanks for the update. The team would like to learn more about this. Please fill out this form and let us know when you’re finished. We’ll have someone reach out to you via email from there.

Cheers,

Renz

[Jasonj72]

Ok I submitted the form

[RenzJ]

Hi Jasonj72,

We got your form. One of our support teams will reach out to you via email. Once you receive an email, please reply to it and continue the conversation there.

Best,

Renz

[Jasonj72]

Renz - I haven’t heard from anyone yet 

[RenzJ]

Hello Jasonj72,

We apologize if this is taking longer than expected. Thank you for your patience. I will follow up on your case with our team, and please keep an eye on your inbox as they will send you email to continue with this case. 

Thanks,

Renz

[Jasonj72]

RenzJ - I still haven’t gotten a response back yet

[RenzJ]

Hey Jasonj72,

We know that this has taken some time. Rest assured, we're not leaving you hanging. I’ve made another follow-up with our team.

Regards,

Renz

[RenzJ]

Hi Jasonj72,

Thank you for your patience. One of our support teams has already reached out to you via email. Please reply to the email and continue the case there.

Best,

Renz

[Jasonj72]

I have not received an email yet. Do you know when it was sent?  

[Jenelyn_O]

Hey Jasonj72,

I'm sorry for the delay. Our support sent you an email way back November 20. Please check your inbox, junk, and spam folder. Ensure that you're logged in to the email account you are using in the Google Nest Community. 

Kind regards,

Jenelyn