Troubleshooting Guide to Setting Up Your Smoke & CO Listener

If you are setting up your Ring Smoke & CO Listener* and you have a problem with your setup, you may be directed to restart the entire setup process. While you should follow the directions as instructed, there are be a few differences in what needs to be done the second time around, This article will help you with instructions and troubleshooting tips if you have trouble with your Smoke & CO Listener* setup.

Click here for the original setup instructions. 

Instructions for Replacing Your Smoke & CO Listener* Battery

* Always insert replacement batteries correctly, matching the + (positive) and - (negative) symbols on the battery with the symbols on your Smoke and CO Listener.*



  1. Disarm your Ring Alarm.
  2. Carefully remove the cover from the device by turning the lid counter-clockwise. Lift to remove.
  3. Remove the old battery from the base and insert a new CR123A battery, taking care to match + and - symbols with the markings on your sensor. Confirm that the + and - symbols show on top when inserted.
  4. Place the lid back on the device, making sure to line up the semi-circle on the lid with the “open” semi-circle on the base. Lock the lid back on by turning it clockwise.
  5. Check your Smoke & CO Listener* by pressing the test button on your smoke or CO2 detector. If working, you’ll receive a notification from your Ring app.


The app is telling me to "pull the tab" on my Listener.* I've already done that, so what do I do now?

If the app is prompting you to pull the tab but you've already done so, the following procedure will do the same thing:

  • Pop open the case.
  • Remove the battery.
  • Reinstall the battery. 

The device should start looking for your Base Station.

I'm having a problem scanning the QR code into my system. 

Fortunately, there is an alternative method of proceeding through the setup process even if you can’t scan the QR code. Simply follow these instructions: 

  • At the bottom of the scanning screen, select Not working? Enter number instead.
  • You will then be prompted for a 5-digit PIN code.
    • You can find this 5-digit number under the QR code for your device.
    • The 5-digit code can also be found on the box your Listener* came in labeled as the “DSK”. The 5 digits of the number you need are underlined.
  • Enter the 5-digit PIN code and continue following the in-app instructions.
  • Pop open the case.
  • Remove the battery.
  • Reinstall the battery. 
  • Press the button on the side of the Smoke & CO Listener.*

Continue to follow the in-app instructions to complete your setup. 


* Smoke and carbon monoxide monitoring is not available for commercial properties. See Ring Alarm licenses at:​

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