Customer Reviews For The First Alert Basic Battery Operated Carbon Monoxide Alarm - CO400
Rick F
November 7, 2022Order process was simple and product arrived as scheduled. Installed the included battery, tested then mounted on wall where the old one was. Now I can only hope it works when necessary....fingers crossed that time never comes!! The previous one was replaced as a result of the end-of-life alarm feature. It was already in use when I moved into the house Nov 2016. I would reccommend.
Betty H
October 10, 2022Carbon Monoxide Alarm purchase
Our carbon monoxide alerted us that it was at end of life. We quickly replaced it thru First Alert. We have been fortunate to never need the alarm but we know of friends who are still alive because their First Alert woke them up. The order process was so easy and efficient.
Manuel C
September 8, 2022easy install
Ordered exact same model to replace. Easy to install with existing mounting screws.
William A
September 5, 2022Thanks First Alert
Ordered product to replace expiring unit. Came very quickly, with an included battery and placed in previous position to protect the home. Great service.
Darlene S
November 8, 2021First Alert Alarm
Replaced the original with the same type. Fast shipping and easy set up. Will replace with same when needed. Love it!
SHIRLEY W
September 29, 2021Perfect!
As promised, order arrived quickly, in mint condition. and with clear instructions as to how to set up and use it. The alarm worked perfectly the first time, and I have no doubt it will last as long as the one it replaced.
George N
May 17, 2021Couldn't Have Been Easier
I recently had to replace my First Alert CO detector. I decided to buy the same Model#. When did a Google search for that item, I was pleasantly surprised to find that the First Alert direct price was the lowest, and shipping was free. The whole ordering process was very easy, and I received the item quickly.
Tom Rubenstein
March 2, 2021Basic Battery Operated Co2 Alarm-CO400
Ordered product directly for First Alert website...easy to navigate and simple order process. Received product within 3 days. Directions for install were thorough and straightforward.
James D Stewart
January 25, 2021Fast and easy
I have ordered from this site before. It is easy to order and delivery is fast. Product arrived and is as described on the web site. Good product.
Lisa Andrade
December 17, 2020Fast Service!
Very easy to order and fast service!
Karen Eskew
December 1, 2020Always use first alert products. Very trustworthy and safe.
Steve K
November 30, 2020Works fine and easy to install
Philip Davis
October 10, 2020Three pack
Fast delivery, packaged well, exactly as expected.
Bernard Dube
August 4, 2020Homeowner
My order came in and seems to be operating well. Thank you
Allan Griff
July 20, 2020Nothing wrong with device, but was disappointed to find bolt holes not same distance be so I had to put in a new wallbolt. B
Elisa Goodwin
July 6, 2020Works as expected!
Received the item on time and it works as expected. Happy with my purchase thus far. One item to note: the placement of the screw holes in this model has changed in recent years, so while I was trying to avoid having to drill new holes by purchasing the same model as I was replacing, I did have to accommodate the change in design.
Melvin Matter
June 1, 2020New CO400 to replace old CO400
Very good unit to purchase. One thing to note. The model number was the same as old CO detector we had, however new one would not mount on old mounting brackets. The screws were at different lengths so had to drill more holes in the wall. Would be nice if the model number had consistancy.
Robert Nicosia
June 1, 2020First Alert CO-400 Carbon Monoxide Alarm
This new CO detector is excellent. It replaces my previous CO-400 which needed to be retired after 8 years of reliable service. It makes sense to stay with a winner. The First Alert Store was a pleasure to deal with and they had my new detector in my hands within a week.
Michael Arden
May 20, 2020So far so good
Seems to be working OK after a month
joseph dillon
May 10, 2020The very BEST
Years of use...
Here are a few situations that may cause a carbon monoxide alarm "false alarm:"
- The carbon monoxide alarm needs to be relocated. Carbon monoxide alarms should be located 15-20 feet away from all fossil fuel burning sources like furnaces and stoves. Alarms should be located 10 feet away from sources of humidity like showers.
- Fossil fuel burning appliances may not be burning fuel completely. Check pilot lights/flames for blue color. Appearance of yellow or orange flames indicates incomplete combustion-a source of carbon monoxide.
Basic Battery Operated Carbon Monoxide Alarm
The First Alert CO400 Carbon Monoxide Alarm utilizes an electrochemical carbon monoxide sensor that lasts for up to five years to detect carbon monoxide. This carbon monoxide detector is battery powered, making it portable and easy to use anywhere, even in the event of a power outage. When carbon monoxide levels become elevated, a loud 85-decibel alarm alerts you to the threat.
The Most Accurate CO Sensor Available
The First Alert Carbon Monoxide Alarm uses an advanced electrochemical CO sensor to detect elevated carbon monoxide levels. When CO is detected, the carbon monoxide detector sounds an alarm to warn you of the threat.
Comprehensive Warning Features
When carbon monoxide levels rise, the carbon monoxide detector sounds an 85-decibel siren that is designed to wake even the soundest of sleepers. A low-battery light and alarm alert you when battery power is running low, and an end-of-life timer lets you know when the device should be replaced. Each CO detector lasts approximately five years.
Simple and Easy to Use
The First Alert Carbon Monoxide Alarm is easy to set up. Simply insert the battery, and the CO detector will start to monitor your space for carbon monoxide. There are no complicated displays or settings to navigate. A single button silences the alarm and tests the CO detector. A pull-down action chart instructs you of what to do if the CO alarm goes off.
Where To Place Carbon Monoxide Alarms: One on every level of the home and one in each sleeping area.
First Alert Carbon Monoxide Alarm CO400
