Customer Reviews For The First Alert Basic Battery Operated Smoke Alarm - SA303CN3

Overall Rating

55 Reviews
55 customers recommend this product
Susan M
October 23, 2022
Verified Purchase
Simple Process

What I appreciate and admire about First Alert is I was able to buy the same model I had and it fit perfectly on the base. I am so thankful to be able to swap out my old smoke alarm for my new smoke alarm in seconds!

Kate and Bill M
October 18, 2022
Verified Purchase
First Alert Basic Battery Operated Smoke Alarm

set up easily. My last set lasted over 12 years. Great investment for your home

Pete B
October 26, 2021
Verified Purchase
Just what I ordered!

Products were properly pulled from the shelf and sent. Arrived in good shape and the 2 units replacements for existing were installed the next day and found to be working. I highly recommend this retailer.

Brent B
August 16, 2021
Verified Purchase
THE place to buy First Alert products

First Alert products are excellent, including this simple battery powered smoke detector. I used this one to ensure I had both PE and Ion detection in a bedroom. The First Alert Store has great prices, very quick shipping and superlative customer service.

Antonio T
July 28, 2021
Verified Purchase
Easy to Install

We recently purchased a house that came with a SA303 from 2009. Happy to say that the newer model SA303CN3 fits into the existing bracket. Put in a battery, close the lid, and twist in -- as easy as pie.

Ronald Walsh
January 1, 2021
Verified Purchase
Very Pleased

Easy to install, came with battery, received product in 3 days

Louis Soriano
December 14, 2020
Verified Purchase

Have Throughout The House

Louis Soriano
November 16, 2020
Verified Purchase
Have Throughout The house

Changed over to these from some 20 year old First Alert models I had

Louis Soriano
October 30, 2020
Verified Purchase

Burnt something in the toaster last night works fine

Rhonda Smith
August 21, 2020
Verified Purchase
Best price around

This is exactly what we needed to add more protection around our house fast and easily. This is the best price I found online and around town.

Claudia Wizner
July 21, 2020
Verified Purchase
Back to Basics

I have found these basic battery run smoke detectors are my favorite. I have scheduled calendar reminders for regular tests and battery replacement so I never forget and my detectors are always on guard..

David Pflibsen
April 11, 2020
Verified Purchase

I like it

Ronda G
April 7, 2020
Verified Purchase
Good review

Product shipped very fast. Basic smoke alarm. Would purchase again.

Diane Conner
March 9, 2020
Verified Purchase
simple to use

Basic smoke alarm that fits the bill. Inserting battery and installation of the alarm to the ceiling was easy. I would buy again.

Doretta Frana
December 12, 2019
Verified Purchase
First Alert Smoke Alarms

I have always bought First Alert Smoke Alarms and I like them. Thank God I have never actually had a fire to really test them.

Margaret Rick
December 12, 2019
Verified Purchase
THAT Was Easy!

I was especially impressed with the assistance I received over the telephone. I had old alarms. Maria checked the serial number, told me that, yes, the alarms had outlasted their usefulness and then checked to recommend replacement that would allow me to insert the new alarms in the old frames. And, by the way, they were on sale. I ordered them online. They arrived promptly. Sure enough, they fit into the frames that were already installed in the ceilings. It couldn't have been easier.

Corey Weiss
November 16, 2019
Verified Purchase
Great smoke detector

Works great. Product was shipped very quickly. Good, inexpensive smoke alarm.

Corey Weiss
October 12, 2019
Verified Purchase
Great alarm!

So happy we can still purchase this model directly from the company. A great alarm at a great price!

May 2, 2019
Verified Purchase
Smoke Alarm - SA303CN3 1039796

Reliable and inexpensive

April 11, 2019
Verified Purchase
Easy to install

The smoke alarms arrived quickly in the mail and were very easy to install. They also came with a battery which saved me time from having to go purchase one. Very satisfied with the product

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 section.
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 and combination alarms.

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.

Basic Smoke Alarm

First Alert's Series of Basic Smoke Alarms work exceptionally well in detecting flaming fires. A Mute Button has been included to serve the dual purpose of silencing nuisance alarms brought on by cooking smoke and shower steam. This button also allows you to test the functionality of your alarm. First Alert Basic Alarms are an ideal purchase for those looking for basic fire protection with the option of conveniently muting false alarms. Basic Smoke Alarms also come equipped with an EZ access battery door that removes the hassle and burden of collecting your alarm from the ceiling and replacing its batteries. The combination of a 9v battery and an increased emphasis on the unit's 85db sound output establish peace of mind, while the inclusion of an anti-theft prevention lock all but guarantees the safest of experiences. This alarm carries a 10 year limited warranty and complies with UL217 Standards.

Ionization Sensor Reliably Detects Flaming Fires

The First Alert Basic Battery Operated Smoke Alarm with Battery Backup comes equipped with an ultra-reliable ionization sensor to provide the earliest possible warning of a fast-flaming fire. The sensor is optimized to detect flaming fires, such as those caused by paper, kitchen grease, and other fast-combusting materials.

Battery-Powered Alarm Installs Easily

This battery-powered smoke detector requires no rewiring and no electrician to install. Simply mount it on a wall or ceiling using the open mounting design. An end-of-life signal will notify you when the detector is nearing expiration.

Test and Silence Button

Mute Button has been included to serve the dual purpose of silencing nuisance alarms and testing the functionality of your alarm.

EZ-Access Battery Door

The addition of an EZ Access Battery Door removes the hassles and burdens associated with changing your alarm's batteries.

First Alert Smoke Alarm SA303CN3

* California and New York Residents - Please note this alarm is not compliant with your State's 10 Year Sealed Battery Alarm Legislation Requirements.

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