Troubleshoot false smoke alarms or when the app says "the smoke sensor has failed"
If Google Nest Protect sounds a smoke alarm when there is no smoke, or if it chirps and your Nest app says there’s a sensor failure, then it needs your attention. In some cases, this occurs because dust got into the smoke chamber or steam has set it off. Dusting your Nest Protect and placing it away from any sources of steam can solve the issue.
Dusting your Nest Protect
All photoelectric smoke alarms can be impacted by dust. So it’s
There are two signs that dust may have made it into the smoke chamber:
Nest takes steps during the manufacturing process to ensure that your Nest Protect remains dust-free. We also package it with a dust cap to keep dust out during the shipping process.
However, dust can get into your Nest Protect in several
You’ll want to give Nest Protect a thorough dusting, and
If the problem persists, please contact Nest Support.
Placing Nest Protect away from sources of steam
Steam can also trigger false alarms in many smoke alarms. Common household sources of steam include showers and humidifiers. So if you’ve experienced a false alarm and your Nest Protect is placed nearby a source of steam, this may well be the cause.
To help lower the number of false alarms caused by steam, Nest developed Steam Check. Steam Check helps Nest Protect tell the difference between steam-related events and real fire or smoke events.
While Steam Check helps Nest Protect distinguish between steam and smoke, but it won't stop all steam-related alarms. If Nest Protect observes steam that appears similar to real smoke or fire, the alarm will sound.
Steam Check helps lower the number of false alarms caused by steam or high humidity, but the best way to eliminate steam-related false alarms completely is to move Nest Protect away from sources of steam like bathrooms and home humidifiers.