This article is for 1st gen Nest Protect. Check which Nest Protect you have.
If you don’t see a blue light or hear the welcome message after removing the battery tab, the batteries may need to be re-seated. To fix the problem, you will need to remove the batteries and clean out any pieces of the battery tab that are left in the battery tray.
1. Remove the two screws on the back of Nest
2. Remove the batteries in each battery tray,
3. Press down on each battery to make sure
Note: You will need to push the spring-loaded
3. Once the batteries are reinstalled, reattach