Customer Reviews For The First Alert SA9120BCN 120VAC Hardwired Smoke Alarm with Battery Backup (1039816)
John Meich
September 4, 2018Replacement product is excellent and matches the current system!
Mark Chlebecek
June 12, 2018Replacements for original units / Fit well
Margaret M Wytrwal
March 19, 2018Smoke Alarm w/Battery Backup
Exactly what I had hoped for. Great pricing and quick delivery
Theodore Taylor
January 22, 2018Ease of Installation and Price
The 3 smoke alarms were much improved over the last ones I bought years ago with respect to being able to insert the alarm into the bracket with ease. Also all the alarms go off in any one of them detects smoke/fire. Would recommend them to anyone seriously interested in their own safety!
Dennis Reimink
January 18, 2018happy in safety
I changed all of our 14 year old smoke alarms. It took less than 1 hour. We hadn't known the alarms are only good for a defined time.
Joe D
January 17, 2018Thank goodness your local
Our smoke detectors decided to kick the bucket New Years weekend after 15 long years! We were so glad you were local - we were able to pick up the replacement devices and saved a TON of money versus buying replacement devices from local big box stores. Your staff was so friendly and so accommodating! I hope all of my neighbors buy their replacement devices direct from you when the time comes!
jackie floen
January 10, 2018Great service
No problem with orders, received exactly what I ordered, prompt delivery.
Kathy Romano
January 10, 2018Easily replaced our existing alarms that are no longer working with these.
JoAnn Landry
December 26, 2017Easy installation.
Ian Montgomery
December 26, 2017Replaced a 8 year old unit, fit and worked as expected. Glad they still make this model. Would have been a pain to install another style.
Gangqing Hu
December 25, 2017Low price, high quality and easy to install
The price for the three sets of 120VAC hardwire alarm I ordered from First Alert beats anywhere else. The shipping was fast and the installation was easy and straightforwards as the model is compatibile with the ones to be replaced in my house.
Eileen Trainer
December 19, 2017really good product
completely satisfied. Thank you.
Raymond Dunleavy
November 7, 2017Easy
Dealing with the first alert store was great. Order came on time and people I dealt with were VERY HELPFUL. Smoke alarm was a replacement from an old one. Matter of changing electrical cable and plugging in. Easy
Charyce Hill
October 24, 2017120VAC Hardwired Smoke Alarm with Battery Backup
I have 12 of this smoke alarm in my home, all of which have been perfect for the past 12 years. Had to replace only one unit as a plastic clip that holds the battery in place broke. Highly recommended.
donald kreindler
October 4, 2017swapped out older alarms and it was seamless
donald kreindler
September 20, 2017Very happy with this product. I used it to replace an existing one and it just slipped right into place.
Gregory Hudspeth
September 6, 2017Smoke Alarm
This is a great produce and easy to install.
Gregory Hudspeth
August 30, 2017Hardwired Smoke Alarm
They are easy to install and work great.
Charles Stickney
August 28, 2017Play it safe
I have six of these devices in use and they have just passed their warranty expiration date 10 years. It doesn't hurt to have a spare on hand.
Ed Shattle
August 24, 2017Happy
My existing alarms are now going on 10 years old & all probably need to be replaced. I was extremely pleased to find my model on-line for a reasonable cost. Received it within a couple of days & easily installed it.
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.
- 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.
- 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.
- 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.
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.
120VAC Hardwired Smoke Alarm w/ Battery Backup
The First Alert 120VAC Hardwired Smoke Alarm with Battery Backup works exceptionally well in detecting flaming fires. Capable of wiring directly into your home's electrical system, this smoke detector features a near effortless installation process. This hardwired smoke alarm comes equipped with a Mute Button that serves the dual purpose of quickly silencing your detector as well as testing its function. The combination of a Battery Backup that provides optimal protection in the event of a power outage and an increased emphasis on the unit's 85db output establish the ultimate in peace of mind. This First Alert Hardwired Smoke Alarm comes with a 10 year limited warranty and complied with UL217 Standards. Save additionally with the option to bundle.
Ionization Sensor Reliably Detects Flaming Fires
The First Alert 120VAC Hardwired 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.
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.
Battery Backup for Detection During a Power Outage
This smoke alarm is designed for hardwired installation, but it also features a battery backup that helps ensure continued functionality in the event of a power outage. The unit comes with a 9-volt battery and features a pivoting, easy-to-access battery drawer that allows you to replace the battery without dismounting the alarm.
Works in Tandem with Other First Alert Alarms
In addition to functioning independently, this smoke alarm can also integrate with up to 12 other First Alert or BRK hardwired alarms for coverage of larger spaces. It also integrates with up to six other compatible devices, such as bells, horns, and repeaters. If one alarm in the series is triggered, they will all sound. The alarm features a latching indicator to identify which unit triggered the alarm, alerting you to the area of danger.
Recommended replacement for the following obsolete models:
BRK 4120B
BRK 4120SB
BRK 86RAC
First Alert SA4120B
First Alert SA4121B
First Alert SA4919B
First Alert 120VAC Hardwired Smoke Alarm with Battery Backup - SA9120BCN
