Type E thermostat doesn’t light up after changing battery and charging

[HughBurton]

I changed my battery on Type E thermostat charged it and nothing lights up when I press the face in. The only response I do get is a yellow light comes on temporarily when I mount it on the wall. The programming  is still there. 

I changed the battery because I wasn’t getting any response when I pushed the face in so assumed dead battery.

I’ve gone through all the trouble shooting pages and am stumped.

[jamesjhone7]

That behavior (brief yellow light only when mounted) usually points to a power contact issue rather than a dead battery either the battery isn’t seated properly, or the wall base terminals aren’t making consistent contact. Try removing it again, cleaning the contacts, and reseating firmly; also check if any pins on the base are slightly bent. I’ve seen similar troubleshooting cases discussed in H555game  where it turned out to be just alignment/contact pressure rather than the device itself failing.

[HughBurton]

Pins look OK 

[HughBurton]

Still am stumped here. So if I was to replace the Thermostat with a new, same model would it be plug n play? Or would have to reinstall the system as if were new? 

[humbertogarcia]

Hi HughBurton,

Thank you for posting in the community! I understand your Nest Thermostat E display is unresponsive after you replaced the battery. Since you are seeing a yellow light even after checking the base pins, I recognize how concerning this must be. I appreciate your patience during the troubleshooting process and am happy to help you investigate a solution.

@jamesjhone7, 

Thank you for your quick participation and providing appropriate advice to investigate the reasons for this situation. I’ll follow the post from here to gather additional information for further investigation.

@HughBurton,, 

Regarding your question about the replacement process, if the new thermostat is the same model, the steps are similar to plug-and-play; the difference is that you’ll have to remove the previous thermostat from your account to set up the new one.

To begin my investigation, please provide the following details:

• Confirm your Nest Thermostat model; feel free to see the article: How to tell which Nest thermostat you have.
• In which country is the Nest Thermostat installed?
• Is your heating or cooling currently working? 
• Does the thermostat show an error code on the screen besides the yellow light?
• What’s the app you’re using, Google Home or Nest app? (To provide steps to remove and set up your new thermostat, if applicable.)

I look for the answers as well as any clarifications and additional details.

Regards,

Humberto

[HughBurton]

E type

Canada,

heating only

screen remains blank heating and schedule currently working but ,thermostat loses contact with wifi intermittently and  becomes completely non working.

Nest App 

[humbertogarcia]

Hi @HughBurton,

Thank you for providing the information I requested! I’m sorry to hear your screen remains blank and that you’re experiencing intermittent Wi-Fi. To investigate further, could you please provide the following:

• Please attach a photo of the thermostat display.

• Describe the steps you took to replace the batteries.

Thank you in advance for your answer!

Regards,

Humberto