Nest smoke and carbon monoxide alarms

11 reports to CPSC, the latest made Feb 1, 2026. A report isn’t a recall.

Watch it to hear when CPSC publishes new reports about it. CPSC’s own search

Watch and the shortlist are kept with a free account, on every device. Your watch list. CPSC’s own search is on saferproducts.gov.

At a glance

From SaferProducts.gov, released Oct 25, 2026.

11reports to CPSC
Feb 1, 2026the latest report was made
Jul 17, 2021the earliest
10with the company’s comments

Brand: Nest
Makers: Nest Labs, Inc. and GoogleMakers, importers or sellers, as the reports name them
Product: Smoke and carbon monoxide alarmsBoth in oneCPSC’s product type: Combination Fire/Smoke Alarm and Carbon Monoxide Detector (code 714), in Home Maintenance and Structures: Home Security

By month

1 report from March 2025 to February 2026; the most in February 2026, 1. 10 earlier reports, since July 2021, are in the table.

The numbers, as a table

Reports to CPSC by the month each was made, newest first
Month	Reports
February 2026	1
July 2024	1
December 2023	1
November 2023	1
October 2023	1
August 2023	1
December 2022	1
July 2022	2
September 2021	1
July 2021	1

How badly anyone was hurt

Hurt, care not known 1 CPSC: Injury, Level of care not known
No one hurt 8 CPSC: Incident, No Injury
No incident, no one hurt 2 CPSC: No Incident, No Injury

As each report says it, in short words; CPSC’s own words are under each.

The reports, as CPSC published them

Reports people made to the U.S. Consumer Product Safety Commission. CPSC publishes each one after sending it to the company named, and doesn’t guarantee they’re accurate. A report isn’t a recall.

Each report is the words of the person who made it, as CPSC published them. The company’s comments, where CPSC published any, are set apart as the company’s own.

CPSC, SaferProducts.gov public database export. Released Oct 25, 2026. Updated daily.

No incident, no one hurt
Made Feb 1, 2026, sent to the company Feb 5, 2026, published by CPSC Feb 20, 2026

The product, in the report: Nest Protect: 2nd Gen Smoke + CO Alarm - Battery

Nest Protect started chirping unexpectedly with no prior low battery warning. When changing the [REDACTED] Lithium batteries one of the batteries was too hot to touch. I believe this to be a fire hazard and a major fault for a fire / carbon monoxide detector.

Serial number
06AA01AC5220092F
Bought from
Google Store Online
Bought
Mar 14, 2021
Where
Mililani, Hawaii: Home/Apartment/Condominium
Who was involved
Age 46, Male
The reporter’s relation to them
Self
As this report names them
Brand Nest, made or sold by Google
How badly, in CPSC’s words
No Incident, No Injury

CPSC report 20260201-490D7-2147323986. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Jul 23, 2024, sent to the company Jul 25, 2024, published by CPSC Aug 15, 2024

The product, in the report: Google Nest Protect version 2 Smoke/CO alarm

Google Nest Protect smoke/fire alarm had an event last night. Alarm went off. I did not receive a notification on either my phone nor the Nest App. Have verified that all settings are correct. The notification used to work but no longer does. I have confirmed through multiple online forums that this is happening to everyone. Google support does not have an answer or fix as to why this is not working. These notification features are part of their marketing materials and sales pitch. This is extremely dangerous. The entire purpose of purchasing this product is to be notified if a fire/smoke/carbon monoxide event happens in the home.

Model
06A
Serial number
06AA01AC422203MY
Bought from
Home Depot
Where
United States: Home/Apartment/Condominium
Who was involved
Unspecified
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(8/9/2024) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action.

CPSC report 20240723-22942-2147337806. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Dec 3, 2023, sent to the company Dec 5, 2023, published by CPSC Dec 19, 2023

The product, in the report: Nest Protect Smoke/CO Detector

Nest Protect Smoke/CO detectors did not raise an alarm during a smoke event. Had a fire in the fireplace going for about an hour when some pressure changes caused the HVAC to draw smoke into the entire first floor and it eventually made its way up to the center staircase to the second-floor landing. I had to turn off the HVAC and open windows to air out smoke that was clearly seen floating under lamp lights. Nest Smoke/CO detectors next to the kitchen and in the upstairs landing remained silent during the event. The Nest application did not register a smoke event, but it clearly showed motion activity when it turned on the night light feature. The application reported “Everything is ok!” during this event. These are wired powered smoke/CO detectors manufactured in 2018 with an expiration date of 2028. I tested the back-up batteries and they were good. I’m currently working with Nest to determine why these have failed to perform their designed task. I no longer have confidence in the Nest detectors (do they even detect CO? how do I test *that*?)

Model
Topaz-2.7
Serial number
06CA01AC43180ASH
Bought from
Home Depot
Bought
Jan 1, 2019
Where
Sterling, Virginia: Home/Apartment/Condominium
Who was involved
Unspecified
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(12/20/2023) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action.

CPSC report 20231203-30561-2147343674. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Nov 15, 2023, sent to the company Nov 20, 2023, published by CPSC Dec 5, 2023

The product, in the report: Nest Protect Gen 2, Smoke and CO2 Alarm, Battery Powered, see 2nd Gen on this page: https://support.google.com/googlenest/answer/9232605?hl=en

Google Nest Protect Gen 2 Smoke/Carbon Monoxide alarm battery overheating. Second time this has happened in my Nest Protects, I have 7 of them.
November 2022 issue: Nest Protect reported no issues in regular testing since installed in 2019. Suddenly, it loudly chirped and the app popped up with a low battery warning. I popped it off the ceiling and opened up the battery compartment to swap the batteries and was greeted by the faint smell of what I can only describe as hot plastic/burning rubber. I pulled the batteries out and one of them was BURNING hot. Like boiling water hot - could barely touch it. Battery took hours to cool down outside. Google replaced the device through their safety program.
November 2023 issue: Same exact issue, different device. Contacted Nest and am awaiting contact from the safety team again. I used a thermal camera and the hot battery, an [REDACTED] Ultimate Lithium AA battery, was around 150 degrees. Other batteries in the device and the other 6 devices I checked as a precaution were only 70 degrees.
Extremely concerning since this is a fire detection device and this could have the potential to cause a fire if the battery got hot enough. After having this happen twice to me and seeing many reports on Google Nest’s forum, I felt it appropriate to report to CPSC. See this page for lots of similar reports through the forums: [REDACTED]

Model
Topaz-2.7
Serial number
06AA01AC041906UD
Bought from
nest.com (now owned by Google)
Bought
Aug 1, 2019
Where
Arvada, Colorado: Home/Apartment/Condominium
Who was involved
Unspecified
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(12/5/2023) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. We will continue our customer outreach so we can study this issue and ensure the quality and safety of our product.

CPSC report 20231115-526A6-2147343997. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Oct 7, 2023, sent to the company Oct 11, 2023, published by CPSC Nov 1, 2023

The product, in the report: Nest protect 2

Around 7am this morning our nest protects all came on and stated “There’s an emergency in 1 room. The alarm will sound, the alarm is loud, press to silence” They didn’t light up or say which room or what the emergency was. I also found it odd that it allowed me to silence it since a true alarm that is red will not give you this option. I’ve have nest protects for going on 3 years and have never had this happen before. I always struggle to keep them all connected to the network. I’m in the process of resetting them and starting over.

Where
Syracuse, Utah: Home/Apartment/Condominium
Who was involved
Unspecified
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(10/23/2023) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. We will continue our customer outreach so we can study this issue and ensure the quality and safety of our product.

CPSC report 20231006-EA819-2147344792. Submitter: Consumer Search for it on SaferProducts.gov
No incident, no one hurt
Made Aug 30, 2023, sent to the company Sep 5, 2023, published by CPSC Sep 20, 2023

The product, in the report: Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Battery Operated

Nest Protect smoke/CO2 detector started chirping at 1:00 AM as if it had low batteries. Several of the 6 [REDACTED] Lithium batteries were extremely warm. One was so hot it couldn’t be touched. There was a slight burning smell. Now the hinged battery cover does not latch shut, as if the plastic is deformed. Support number for Nest provided is not longer active. Google community forum said to report it here as there have been other incidents. Google does not respond.

Model
S3000BWES
UPC
8 54448 00367 9
Serial number
06AA01AC0317097C
Bought from
Walmart
Bought
Dec 30, 2018
Where
Cedar Rapids, Iowa: Home/Apartment/Condominium
Who was involved
Age 61, Unspecified
The reporter’s relation to them
Self
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
No Incident, No Injury

The company’s comments, in its own words

(9/20/2023) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. We will continue our customer outreach so we can study this issue and ensure the quality and safety of our product.

CPSC report 20230830-A538A-2147345469. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Dec 1, 2022, sent to the company Dec 6, 2022, published by CPSC Dec 20, 2022

The product, in the report: It is a Nest combination smoke/carbon monoxide detector.

My Nest combination smoke/carbon monoxide detector was chirping once every few minutes at 4 o’clock this morning. I took the batteries out and one of them was very very hot.

Model
06A
UPC
N/A
Serial number
06AA01AC171700RN
Where
Rockland, Massachusetts: Home/Apartment/Condominium
Who was involved
Unspecified
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(12/20/2022) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing safe, high quality, and effective products that help people in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. The user describes that the batteries were hot to the touch. Note that the recommended batteries are designed with electrical fail-safe features. As the customer described, the smoke alarm alerted the user of a problem with the supply of electrical power from the batteries, which is consistent with the product’s design. We are trying to contact the customer to help resolve their issue.

CPSC report 20221201-38827-2147352291. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Jul 15, 2022, sent to the company Jul 21, 2022, published by CPSC Aug 4, 2022

The product, in the report: Nest protect 2nd generation battery version

My nest protect began beeping while I was asleep to indicate the battery was low. I opened up the battery cover and one of the batteries was extremely hot. According to the Nest app it had been indicating the low battery status for around 20 minutes before I woke up. It would have been very dangerous if it had been allowed to overheat longer or if I wasn’t home.

Model
Nest protect 2nd generation
Serial number
06AA01AC251608C9
Where
Redmond, Washington: Home/Apartment/Condominium
Who was involved
Age 35, Male
The reporter’s relation to them
Self
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(8/3/2022) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing high quality and effective products that help people stay safe in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. The user describes that the batteries were hot to the touch. Note that the recommended batteries have safety features that are designed to mitigate safety issues when the batteries reach high temperatures. The customer has not contacted us on this matter, but we will help resolve their concern if they contact us in the future.

CPSC report 20220715-0FA76-2147354998. Submitter: Consumer Search for it on SaferProducts.gov
Hurt, care not known
Made Jul 1, 2022, sent to the company Jul 6, 2022, published by CPSC Jul 20, 2022

The product, in the report: Nest protect smoke alarm battery powered (not hardwired)

Nest protect smoke/co alarm manufactured Jan 15 2017. Chirped for low battery warning. I within 2 minutes removed the batteries. One of the batteries was so hot it burned my finger! Very scary. Smelled like melting/burning. I put it outside and I have not put new batteries in it.

Model
Protect
Serial number
06aa01ac021705hj
Where
Wauwatosa, Wisconsin: Home/Apartment/Condominium
Who was involved
Unknown
The reporter’s relation to them
Unspecified
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Injury, Level of care not known

The company’s comments, in its own words

(7/14/2022) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing high quality and effective products that help people stay safe in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. The user describes that the batteries were hot to the touch. Note that the recommended batteries have safety features that are designed to mitigate safety issues when the batteries reach high temperatures. The customer has not contacted us on this matter, but we will help resolve their concern if they contact us in the future.

CPSC report 20220701-BFAD4-2147355278. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Sep 28, 2021, sent to the company Oct 1, 2021, published by CPSC Oct 18, 2021

The product, in the report: Nest Protect carbon monoxide and smoke detector

On Sunday, September 26, I was awakened early in the morning by the chirping of my Nest Protect smoke detector. I had not received any warnings in the Nest app that the batteries were low. The batteries are the Energizer lithium that came with the unit. Three of the six batteries were too hot to touch. I removed the batteries from the detector and put them outside, and have stopped using the detector. This Protect is a second-generation unit manufactured on September 14, 2017, and the serial number is 06AA01AC371703AE. I have four other Nest Protects in my home and am concerned about them having the same issue. I bought these devices to protect my home against fire, not start fires.

Model
Nest Protect 2nd Generation
Serial number
06AA01AC371703AE
Bought from
Amazon.com
Bought
Nov 1, 2017
Where
San Mateo, California: Home/Apartment/Condominium
Who was involved
Unknown
The reporter’s relation to them
Self
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(10/13/2021) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing high quality and effective products that help people stay safe in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. Based on the customer’s description, the unit successfully alerted the customer to an issue with the batteries. The customer also expressed a concern that the batteries might be hot enough to ignite materials. However, the safety features built into our product and the recommended batteries are designed to eliminate any such potential hazard, for example the type of materials used and electrical fail-safe features that respond to high temperature. Thank you again for your feedback, and we apologize for any inconvenience you have experienced.

CPSC report 20210928-80850-2147360364. Submitter: Consumer Search for it on SaferProducts.gov
No one hurt
Made Jul 17, 2021, sent to the company Jul 21, 2021, published by CPSC Aug 4, 2021

The product, in the report: The Google nest protect gen2 is a “smart” battery operated smoke and carbon monoxide detector.

This morning I woke up to chirping of my 4-5 year old google nest protect carbon monoxide and smoke detector (manufactured June 2016). I then got a notification that the batteries needed to be replaced. The batteries are the original Energizer lithium ion ones that came with the unit.
I got out the ladder and pulled the protect from the ceiling. I could immediately detect the smell of burning plastic / electronics and felt the back of the unit was hot. When I pulled out the batteries, one row was cool and the other was very very hot - I thought I might burn myself and dropped the batteries they were so hot. Using a old shirt, I moved the batteries onto a shelf, but I’m worried the might catch fire (thinking about all the lithium ion battery problems from a few years ago). Very scary.
I contacted the manufacturer and they sent my case to their safety department. They promised to get back to me.
This seems to be a recurring problem (the word “hot” appears as the 3rd [REDACTED] search suggestion when searching for “nest protect batteries”). There are many forum reports of the problem in googles own online forum as well as other forums. Phone support said this was rare, but that clearly isn’t the case from the simple [REDACTED] search. All the other threads are handled privately so it is difficult to know what we should do to “protect” ourselves from the nest protects. I’m very worried that one of these fire detection devices is going to cause a fire!
Thanks, [REDACTED]

Model
Nest Protect 2nd Gen
Serial number
06AA01AC261608YT
Where
Cambridge, Massachusetts: Home/Apartment/Condominium
Who was involved
Age 41, Unknown
The reporter’s relation to them
Self
As this report names them
Brand Nest, made or sold by Nest Labs, Inc.
How badly, in CPSC’s words
Incident, No Injury

The company’s comments, in its own words

(7/28/2021) Nest Labs, Inc.: Thank you for the opportunity to review and consider this report submitted on www.SaferProducts.gov. Nest is committed to designing high quality and effective products that help people stay safe in their homes. When customers have an issue with one of our products, we ask that they contact Nest to provide us with information and the opportunity to retrieve and examine the product, as this customer did. This provides us information that helps us continually monitor the efficacy of our products and identify opportunities for quality improvement or required corrective action. Based on the customer’s description and our communication with the customer, the unit successfully alerted the customer to an issue with the batteries. The customer also expressed a concern that the batteries (which are not Lithium-ion as the customer may have thought) might be hot enough to ignite materials. However, there are safety features built into our product and the recommended batteries are designed to eliminate any such potential hazard, for example the type of materials used and electrical fail-safe features that respond to high temperature. Thank you again for your feedback, and we apologize for any inconvenience you have experienced.

CPSC report 20210717-CF2D3-2147362802. Submitter: Consumer Search for it on SaferProducts.gov

CPSC’s disclaimer

Disclaimer: CPSC does not guarantee the accuracy, completeness, or adequacy of the contents of the Publicly Available Consumer Product Safety Information Database on SaferProducts.gov, particularly with respect to information submitted by people outside of CPSC.

Word for word, from the disclaimer in CPSC’s export.

Sources

U.S. Consumer Product Safety Commission, SaferProducts.gov public database export.

Released Oct 25, 2026 and checked Oct 25, 2026. Updated daily. Public domain (U.S. Government work). CPSC asks to be credited, and that no endorsement be implied.

Reports of harm are from the U.S. Consumer Product Safety Commission (CPSC), on SaferProducts.gov. CPSC does not endorse Hearth Record.

Nest smoke and carbon monoxide alarms

At a glance

By month

How badly anyone was hurt

The reports, as CPSC published them

CPSC’s disclaimer

Sources

How to read a record

Every fact names its source.

A number never stands alone.

What needs attention is marked.

The public record comes first.