Hi @Giacomo007,
Thanks for posting here in the community! I understand how inconvenient it can be when your Nest Protects are showing carbon monoxide sensor failure! I'd be happy to help with your concerns.
To better assist you, I'd like to ask a few questions:
- What type of Nest Protect do you have (wired or battery) and what generation is it?
- How long did the inconvenience occur after the installation?
- Are there any nearby sources of steam, smoke, or any other visible vapor?
- Any previous events with Nest Protect, such as false or legitimate alarms, chirps, or other unexpected behavior?
- How were you notified of the sensor failure?
- Does the reported sensor failure correspond with any recent construction, cleaning, or other activities in the house that could have introduced large amounts of dust or foreign particles into the environment?
- Is the Nest Protect near any air vents, fans, windows, or other sources of air flow that could bring dust or foreign particles into the detection chamber?
- Where is the Nest Protect installed (room, ceiling, or wall)?
- When was the last audio test?
For now, let's run a Safety Checkup to see if the sensor failure persists. During the checkup, listen for all Nest Protects to announce the test and watch for their LEDs to activate. Since they're interconnected, this will test all the devices in your home. This is a great way to confirm the speakers and horns are functioning and audible. For more, you can check out this article: Learn about Safety Checkup.
I also recommend cleaning the Nest Protect. Like any smoke alarm, dust buildup on the outside or inside of Nest Protect can stop it from working properly. You can refer to this article about how to clean your smoke sensor: Clean your Nest products.
Please keep me posted.
Best regards,
Jenniffer
