Google Nest Protect alarm showing a yellow ring, chirp every 60 seconds: meaning and exact next steps

Model-specific

What is true of this model and not of its siblings

A sensor that failed its own test

Google says Protect tested its smoke sensor and detected a problem. That is a safety matter, because a smoke alarm that cannot sense smoke does not protect you.

Cleaning and replacing

Google's step is to clean the Protect, and if the problem persists, replace it.

In the meantime

Install a working smoke alarm in the room until the Protect is fixed or replaced.

Replacement and disposal

A Protect has a service life of about ten years from manufacture, so an old unit that fails its sensor test is due for replacement anyway. Google accepts returns of old units for recycling in the United States. Do not throw a smoke alarm in household waste.

Staying protected

Until the Protect is replaced, add a battery smoke alarm in the same room. A room with a faulty alarm and no other protection is a risk you can remove in a few minutes.

What cleaning means

Google's cleaning instructions use a vacuum with a soft brush attachment at the vents, never water or sprays. Cleaning removes dust that trips the sensor test, and the Nest app can then run a manual test.

When it started

Check when the message began. A message that appears soon after a bout of cooking, a bath with steam or the use of an aerosol may be dust or moisture that cleaning clears. A message that appears out of the blue on an old unit usually means the sensor is at the end of its life.

Checking the date

Look at the manufacture date on the back of the Protect. A unit near the end of its service life should be replaced even if cleaning clears the message, because sensors lose sensitivity with age. Replace on schedule, not only on failure.