Carbon Monoxide and Smoke Detector (Combo Pack)
The First Alert Carbon Monoxide and Smoke Detector Combo Pack allows you to maximize overall protection in one very affordable package. First Alert Battery Operated Smoke Alarms utilize Ionization Smoke Sensing Technology that's ideal in identifying flaming fires. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms and testing the functionality of your alarm. Featuring an increased nod to safety with an 85- decibel sound output, these alarms feature a 10 year limited warranty.
First Alert Carbon Monoxide Alarms utilize an Electrochemical Sensor that's proven to be the most accurate technology available in detecting CO. Sleek and compact in design, the model requires no additional installation. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms and testing the functionality of your alarm. An End of Life Timer has also been included to alert owners of battery replacement. First Alert Carbon Monoxide Alarms feature a 5 year limited warranty.
This combo pack is for you if:
- You want basic protection from both smoke and carbon monoxide at an affordable price.
Where To Place Carbon Monoxide Alarms: One on every level of the home and one in each sleeping area.
Where To Place Smoke Alarms: One in every bedroom, and at least one on every level of the home.
First Alert Carbon Monoxide Alarm CO400 and First Alert Smoke Detector SA303
* California and New York Residents - Please note this alarm is not compliant with your State's 10 Year Sealed Battery Alarm Legislation Requirements.
How often do you need to change the batteries?
Actual battery service life depends on the particular design of your smoke or carbon monoxide alarm and the environment in which it is installed. All kinds of alarm batteries specified in the user's manual are acceptable replacement batteries. Regardless of the manufacturer's suggested battery life, you MUST replace the batteries immediately once the unit starts "chirping" (the "low battery warning"). It is recommended that you change the batteries in your alarms when you change your clocks for daylight saving time. Also consider replacing your current alarms with 10-Year Life Alarms that never require a costly battery replacement for the ten year life of the alarm. This 10-Year series is available in smoke
, carbon monoxide
and combination alarms
What is the proper placement of smoke alarms?
It is important that you have the proper placement for your smoke alarms. Install your alarms at least 20 feet from appliances like furnaces and ovens, which produce combustion particles. Alarms should be at least 10 feet from high humidity areas like showers and laundry rooms, and at least 3 feet from heat/AC vents. Be sure to install a smoke alarm in each bedroom, one at the top of each stairwell, and one on every level.
My smoke alarm keeps chirping and beeping. Why does my smoke alarm chirp intermittently?
It is likely that the reason your smoke alarm keeps chirping and beeping is that the battery is low. Whenever your smoke alarm keeps chirping, replace the battery immediately.
Other reasons include: It could be a different device or appliance such as a security system, monitor, carbon monoxide alarm, or other device which has a similar low battery or alert signal. Some of the same factors that cause unwanted alarms can cause intermittent alarms: dust and insects in the alarm or power interruptions in hardwired alarms. Improper wiring on AC or AC/DC smoke alarms. AC alarms will chirp every 5 seconds if the interconnect wire is grounded. The orange interconnect wire should NEVER be grounded; it should only be used to interconnect other smoke alarms or compatible devices.
Why doesn't my smoke alarm sound when I push the test button?
It is important that you frequently test your smoke alarms. When you are testing your smoke alarm, there are a number of reasons why the alarm might not sound:
- You may not be holding the test button down long enough. Try holding it down for up to 10 seconds (20 seconds on photoelectric models) .
- Your battery may not be installed properly or snapped all the way in place. Even if the alarm sounded briefly when the battery touched the terminals, you still need to make sure it is snapped securely in place. If the battery is loose, in cannot power the smoke alarm properly. After installing new batteries, be sure to test your smoke detector.
- Your AC power may not be on. AC and AC/DC units will have a power indicator light (red or green) that shines continuously when they are receiving electrical power.
- If you have a 10-Year model, the smoke alarm may not have been properly activated. If the tab broke away before the alarm was activated, you can use a toothpick to move the switch over to test the alarm.
Why does my smoke alarm go off when I install a battery or turn on the AC power?
It is normal for smoke alarms to go off and sound briefly (up to 5-10 seconds) when you install a new battery or when they are powered up. If the alarm continues to go off and no smoke is present, the cause may be one of the following:
- There may be insufficient battery power, try new batteries.
- Problems with voltage or insufficient electrical power (brown out) may cause a continuous weak sounding alarm. For AC or AC/DC models, temporarily disconnect power at the service panel until the brown out is over. If you do not restore the AC power, your smoke alarms cannot warn you of a fire.
- Incompatible warning device. If an incompatible alarm or auxiliary device is linked into a series of AC or AC/DC smoke alarms it may cause the system inadvertently go off.
My smoke alarm keeps chirping, even with a new battery. What is causing this?
There are a number of possible causes for your smoke alarm to keep chirping even with a new battery.
- It is possible that your smoke alarm "silence" button was pushed by mistake. The alarm will now "chirp" once a minute for up to 15 minutes before resetting.
- Are you sure it's the smoke alarm? Funny to ask, but other devices have similar low battery chirps or warning tones.
- Your "new" batteries may not be fresh. If batteries are stored, especially in cold areas like refrigerators, they lose their charge more quickly. Always check the freshness date on the package when buying new batteries. Keep plenty of replacement batteries on hand so that you are sure to always be protected by your smoke alarms.
I lost my First Alert smoke alarm owner's manual. How can I get a new one?
First Alert smoke alarm owner's manuals are available online for download at no cost. Find your alarm in our Smoke Alarms
Why does the National Fire Protection Association (NFPA) recommend that home smoke alarms be replaced after 10 years?
Smoke alarms have a limited life. Although each smoke alarm and all of its parts have passed many stringent tests and are designed to be as reliable as possible, any of these parts could fail over time. Therefore, you must test the devices weekly. The unit should be replaced immediately if it is not operating properly. The performance of smoke alarms older than 10 years is simply not reliable. To ensure your family's safety, all carbon monoxide and smoke/CO combination alarms need to be replaced every 5-7 years. All smoke alarms need to be replaced every 10 years.
If it's time to replace your alarms, consider the NEW 10-Year Life series and never have to worry about a battery replacement for the life of the alarm.10-Year alarms are available in smoke
, carbon monoxide
I'm ready to change my alarm battery - what replacement batteries can I use?
Check your User's Manual or the nameplate on the back of the alarm. Different smoke detectors & CO alarms use different kinds of batteries - 9V, AA, AAA - it all depends on the particular model you have. Use quality batteries like lithium batteries - having plenty of power is worth any extra cost. Never use rechargeable batteries because they may not always provide a consistent charge.
24 Customer Reviews
4.8 Overall rating
First Alert SCO403 Carbon Monoxide and Smoke Detector Combo Pack (1039879) Reviews
Easy to install, tested as directions said.
A great deal!
I have used this same smoke detector before which had a permanent battery, so I was glad it was still available even though now the battery is user replaceable. The CO Detector is new to me, so I'm hoping it will offer another layer of protection in my bedroom. First Alert products are very well made and this combo pack just works for me! Thanks!
Install was very fast 5 stars.
Only use First Alert excellent products
Great deal for the price. Purchased 3 combo units.had issue with one of the carbon monoxide units defective. Was sent another. know see if i get credited to charge.im very satisfied with units
Easy to install, instructions clear, batteries. Received in a flash. What more do I need.
The Value Pack
Good price, easy to install, shipped super fast. What more could I want.
Great Deal and Product
Easy to install and came exactly as described! Great product!
Co2 and Smoke
Great quality and reliability.