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Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display

First Alert GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm with Backlit Digital Display. Featuring a backlit digital display, this explosive gas and CO detector plugs into any AC outlet with no additional mounting hardware needed.

Detects Dangerous Levels of CO and Explosive Gases

Designed to promote peace of mind and household safety, the GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm accurately senses the presence of methane and propane. It also features an advanced electrochemical CO sensor that detects carbon monoxide leaks from a variety of sources, such as faulty fuel-burning appliances, blocked chimneys, and cars left running in the garage. When the alarm detects a threat, it alerts you with a loud 85-decibel alarm.

Backlit Display for Reviewing Readings

Equipped with a backlit digital display, the GCO1CN Combination Explosive Gas and Carbon Monoxide Alarm takes the hassle out of monitoring CO and explosive gas levels in your home. The display gives you a clear readout of current and peak levels, allowing you to discern patterns that indicate potential leaks from an appliance, a generator, or other source.

Plugs into Any AC Outlet for Effortless Setup

This alarm is easy to set up and doesn't require any wiring or the help of an electrician. The compact, low-profile unit plugs cleanly into an AC wall outlet without obstructing other sockets and comes with a line cord for versatile placement options. The alarm also features a 9-volt backup battery to help ensure continued operation in the event of a power outage. A pivoting, easy-to-access battery drawer allows you to replace the battery without dismounting the alarm.

Easy to Operate and Test

For added convenience, the alarm can be configured to work with almost any standard household remote control (not included), so you can remotely silence false alarms. A one-touch silence/test button makes it easy to test the detector or mute it during a false alarm. And thanks to the end-of-life timer, you can know exactly when it is time to replace your alarm.

First Alert Combination Explosive Gas and Carbon Monoxide Alarm GCO1CN

How do I get my carbon monoxide alarm to stop chirping?
If your carbon monoxide alarm keeps chirping, the battery may be low or weak. On First Alert carbon monoxide detectors, check to see if the battery light is yellow or green. If the alarm is chirping and the light is yellow, it means the battery is low. The way to get a carbon monoxide alarm to stop chirping is to replace the battery.
Where should I install carbon monoxide alarms? What is proper carbon monoxide alarm placement?
It is very important to install carbon monoxide alarms near or in each separate sleeping area. Many states now require that a carbon monoxide alarm is placed in each bedroom. For added protection, placement of an additional carbon monoxide alarm at least 15-20 feet away from the furnace or fuel burning heat sources is recommended. Also, install carbon monoxide alarms at least 10 feet from sources of humidity like bathrooms and showers. In two story houses, install one carbon monoxide alarm on each level of the home. If you have a basement, carbon monoxide alarm placement is recommended at the top of the basement stairs.
Is there anywhere I shouldn't install carbon monoxide alarms?
Do not install carbon monoxide alarms in garages, kitchens, furnace rooms, or in any extremely dusty, dirty, humid, or greasy areas. Do not install alarms in direct sunlight, or areas subjected to temperature extremes. These include unconditioned crawl spaces, unfinished attics, un-insulated or poorly insulated ceilings, and porches. Carbon monoxide alarms should not be installed in outlets covered by curtains or other obstructions. Do not install in turbulent air-near ceiling fans, heat vents, air conditioners, fresh air returns, or open windows. Blowing air may prevent carbon monoxide from reaching the CO sensors.
How many carbon monoxide alarms should I have in my home?
So how many carbon monoxide alarms should you have in your home? The National Fire Protection Association (NFPA) recommends that you should have a carbon monoxide alarm centrally located outside of each separate sleeping area in the immediate vicinity of the bedroom. For added protection, you should have additional carbon monoxide alarms in each separate bedroom and on every level of your house, including the basement. Some states now require that you have a carbon monoxide alarm in each bedroom of the house. If you install only one carbon monoxide alarm in your home, place it near or in your bedroom.
What is the proper way to do a carbon monoxide alarm test?
The following procedure is the proper way to do a carbon monoxide alarm test - Press and hold the Test Button on the front of the alarm until the alarm sounds. Be sure you hold the button down long enough; it can take up to 20 seconds for the alarm to respond to the test.
Is it a false alarm when my carbon monoxide alarm sounds and there doesn't seem to be a problem?
A carbon monoxide alarm false alarm should not occur if your alarm is in working order. Remember, carbon monoxide is an odorless, colorless gas. If your carbon monoxide alarm went off, it detected potentially harmful amounts of carbon monoxide. After the professionals have evaluated the situation, make sure no one has any symptoms of carbon monoxide poisoning.

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.
Product Details
Product Specs
Carbon Monoxide Alarms and Detectors
Product Manuals

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GCO1CN customer reviews

Overall Rating

54 Reviews
54 customers recommend this product
First Alert Explosive Gas and Carbon Monoxide Alarm - GCO1CN Reviews
Andrea W
April 29, 2024
Verified Purchase
Gas Alert

The detectors are easy to install. They are great for peace of mind.

April 13, 2023
Verified Purchase
Easy to set up, compact design

Set up took just a few minutes and it tested perfectly.

Kenneth W
September 7, 2022
Verified Purchase
Gas and CO2

Works great!

Sarah R
March 1, 2022
Verified Purchase
easy to use

first alert shipped quickly, the explosive gas alarm has a backup battery and plugs into the wall. it shows it is working and the test button performed as it should.

Robert B
January 23, 2022
Verified Purchase
Combination, CO/Smke Detector

This was a replacement unit for a similar original installation. These units have a 5 yr life expectancy and my original was at its 5 year anniversary. I had no maintenance problems during its life just battery replacements. Fortunately it was never called upon to alarm. Easy and convenient to install. With gas fired HVAC and gas cook stove I felt the need to add this protection.

David R
November 19, 2021
Verified Purchase

Great product,great price,very quick shipping! 100% satisfied

David R
November 4, 2021
Verified Purchase

Perfect, fast shipping. I would recommend

Ross L
September 3, 2021
Verified Purchase

Excellent alarm for propane use. We have never had a problem with it.

James S
July 6, 2021
Verified Purchase
carbon monoxide

this product is really and all of our customer loved this detector.

March 17, 2021
Saved Our Lives!!!

We purchased several CO alarms with the explosive gas detector a while back, model GC01CN. Nice because it has a variety of mounting options, and battery backup. The other afternoon, one of the alarms went off....thought it was probably a low battery warning. Battery checked fine, but over a 70 rating on the CO alarm!!! Yes, we evacuated immediately Checked the gas stove, it was off, and I thought there was a low likelihood that the furnace was the source as it was less than 6 month old, and we have an electric hot water heater.... Well guess what, it WAS the new furnace!!! There was a malfunction in a gas valve...I was assured that it was covered under warranty not comforting, but what was comforting was the performance of our First Alert GC01CN alarm. Thank you very much.

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