Model # 21010407-A

Internet #205422307

Store SKU #1000392327

Kidde Worry Free 120-Volt Hardwired Inter-Connectable Smoke Alarm with 10-Year Battery Backup
0047871114078

Kidde

Worry Free 120-Volt Hardwired Inter-Connectable Smoke Alarm with 10-Year Battery Backup

  • 10 year battery back up
  • ACDC installs
  • Ionization sensor
$27.97 /each

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Product Overview

Kidde 10 Year Worry Free Smoke Alarms protect your family for 10 years with a "sealed in" Lithium Ion Battery back up. 10 year Worry Free smoke alarms protect against tampering with a sealed in battery. 10 Year alarms provide an "End of Life" indicator at end of the product life alerting you to replace your smoke alarm.

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Customer Questions & Answers

Worry Free 120-Volt Hardwired Inter Connectable Smoke Alarm with 10-Year Battery Backup
Worry Free 120-Volt Hardwired Inter Connectable Smoke Alarm with 10-Year Battery Backup

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2 answers

Will these interconnect with Model # 21010625 2-in-1 Battery Operated Wireless Combination Fire Smoke and Carbon Monoxide Alarm?

This question is from Worry Free 120-Volt Hardwired Inter Connectable Smoke Alarm with 10-Year Battery Backup
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October 17, 2016
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October 17, 2016
Answer: 
No, these will not interconnect with model #21010625.
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October 17, 2016
Answer: 
Hello Smokey. No. That 21010625 will only work with other alarms that are model 21010625. They won't work with this alarm. We are Kidde Product Support at 1-800-880-6788. Thank you for your interest.
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Replaced 9, get a beep every once in a while. All have green light on. Turned power off/on few different times. still a beep occassionally.

This question is from Worry Free 120-Volt Hardwired Inter Connectable Smoke Alarm with 10-Year Battery Backup
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naples fl
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September 30, 2016
kidde model 21010407-a
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October 3, 2016
Answer: 
Hello 900905. Try this. Unplug the alarms and take them down and put them in your garage or car for an hour or so. Do you still get the chirping in the house? If so, then it is not these new alarms that are chirping. The sound of chirping especially has a tendency to echo and bounce throughout the house and can be nearly impossible to locate. It could be coming from the old alarms if you still have Read More
Hello 900905. Try this. Unplug the alarms and take them down and put them in your garage or car for an hour or so. Do you still get the chirping in the house? If so, then it is not these new alarms that are chirping. The sound of chirping especially has a tendency to echo and bounce throughout the house and can be nearly impossible to locate. It could be coming from the old alarms if you still have them somewhere in the house with the batteries in them, or from a carbon monoxide alarm plugged into an outlet near the floor. If taking the alarms out of the house stops the chirping, call us at Kidde Product Support at 1-800-880-6788 while you are at home and have a ladder out and we can help you troubleshoot. Thank you for your interest. Read Less
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Middletown NJ
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October 1, 2016
Answer: 
I have not experienced that, so I can't offer any advice. Sorry.
As a thought, you could try getting in touch with the manufacturer. It could be a faulty unit or battery.
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1 answer

Can I use these to replace Model 1275. I have 3 that are 10 yrs old loking to buy something Ican...

This question is from Worry Free Hardwired Inter Connectable 120-Volt Smoke Alarm with 10-Year Lithium Battery Back Up (3-Pack)
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October 24, 2016
Can I use these to replace Model 1275. I have 3 that are 10 yrs old loking to buy something Ican plug into my existing wiring and not worry about
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October 25, 2016
Answer: 
The alarm that directly replaces the 1275 is the i12040A or the P12040. However, all Kidde hardwired alarms are compatible with all other Kidde hardwired alarms, and all Kidde hardwired alarms use the same wiring harness. If you used an alarm of a different model, the only thing you would have to change is the plastic mounting bracket. The I12040A, the P12040, and the I12080A all have the same mounting Read More
The alarm that directly replaces the 1275 is the i12040A or the P12040. However, all Kidde hardwired alarms are compatible with all other Kidde hardwired alarms, and all Kidde hardwired alarms use the same wiring harness. If you used an alarm of a different model, the only thing you would have to change is the plastic mounting bracket. The I12040A, the P12040, and the I12080A all have the same mounting bracket as the 1275. The new alarms do come with a wiring harness that is slightly different than the wiring harness of the much older models from before 2004 and is made to be easier to take out of the back of the alarms, but the old wiring harnesses will work with the new alarms with the exceptions of the I12010S (21010407-A), the I12010SCO (21010408-N), and the KN-COSM-IBA (21006377-N). These models will not work with the much older wiring harnesses because these particular alarms won't fit onto the bracket with the older larger plugs. The wiring harnesses can get brittle as they age and the plastic or the wires can break. Best practice is to change out the wiring harnesses every 10 years to avoid that from happening. We are Kidde Product Support at 1-800-880-6788. Thank you for your interest. Read Less
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Which alarm indicator? What happens when 120 volt power off?

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August 31, 2016
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August 31, 2016
Answer: 
Hello Sparky. When the power is out and the unit is in Standby, or normal conditions, the green LED will flash every 60 seconds. Even if the AC power is out, if the alarms go off, the one setting off all of the other will have a green LED flashing every second while they are going off and after they stop, the originating alarm unit will flash the LED every 16 seconds until the test/reset button is Read More
Hello Sparky. When the power is out and the unit is in Standby, or normal conditions, the green LED will flash every 60 seconds. Even if the AC power is out, if the alarms go off, the one setting off all of the other will have a green LED flashing every second while they are going off and after they stop, the originating alarm unit will flash the LED every 16 seconds until the test/reset button is pressed, thus resetting the alarm, even when the AC is out. We are Kidde Product Support at 1-800-880-6788 Read Less
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Customer Reviews

Rated 4.3 out of 5 by 72 reviewers.
Rated 1.0 out of 5.0 by Very disapointed I purchased this smoke detector to replace a Kidde detector that was roughly 5 years old. The previous detector began to chirp frequently and would not hush with the battery replaced and 120VAC confirmed . The latest Kidde detector began to chirp and not hush two months after installation. At same time another Kidde detector (basement) installed during the same time frame began to chirp (battery was replaced twice). The solution was replace the Kidde detectors with two "First Alert" detectors. September 17, 2016
Rated 5.0 out of 5.0 by Good Product Needed interconnect alarms to replace the originals. We interconnected several of this model with a Smoke & carbon monoxide alarm (Model i12010SCO ) for whole house coverage. The lithium battery will eliminate the need to change the batteries every 6 months. Someone's product review complained the "on" light was so bright as to keep one awake -- A star in the sky is brighter - we have to look to see that the small green light is on. December 8, 2015
Rated 5.0 out of 5.0 by One of the best purchases I could make I had these installed by an electrician because I'm not comfortable changing things on the ceiling. July 19, 2016
Rated 5.0 out of 5.0 by WORRY FREE 120-VOLT HARDWIRED INTER CONNECTABLE SMOKE ALARM WITH 10-YEAR BATTERY BACKUP The title sums it up nicely: a hardwired smoke alarm with a 10 year battery backup. It's an easy install; with three wires, it's like wiring a light fixture. No chirping for new batteries while you're asleep or away from the house. PS-Don't forget-these have a 10 year life span, so don't forget to change them accordingly. I can't attest to the longevity, so ask me in 5-10 years. June 24, 2016
Rated 5.0 out of 5.0 by Good safety item They were easy to install as replacement for the existing alarms. When one sounds so do the others. Wake everyone in the house. June 7, 2016
Rated 4.0 out of 5.0 by Perfect Alarms Smoke we really like it, very easy to install. we replace 11 smoke alarm in our house. May 25, 2016
Rated 1.0 out of 5.0 by Questionable batterys In March of 2016 I installed 5 of these in my home all dated October 2015. During the install and after a few minutes, 3 of the five were giving the green flashing light and a chirp every minute indicating a low battery condition. How does the manufacturer expect to get 10 years out of these when three of mine only went 5 months? March 11, 2016
Rated 5.0 out of 5.0 by Great product My daughter was getting nuisance alarms in the middle of the night. Every night! They would remove several of the alarms and go back to bed. As a former firefighter, I couldn't have that risk. The old system was over twenty years old, so I replaced all of the devices (very easy). Now, not only can she and her family sleep at night, but so can I. December 29, 2015
  • 2016-10-31 T16:18:58.427-05:00
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