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Add intelligent protection to your home with the Onelink Smoke & Carbon Monoxide alarm. This 2-in-1 combo alarm detects both smoke and carbon monoxide. Regardless of whether you're home or away, you'll be notified when smoke or co is detected. This First Alert Onelink Combo Alarm is capable of identifying the type and location of the danger. You'll also be able to create a personalized smoke and carbon monoxide safety network by interconnecting other compatible alarms.
Mobile Connectivity through the Onelink Home App
This alarm sends you notifications in the event of a smoke or carbon monoxide emergency. With the Onelink Home app, you can also test and silence your alarm.
Smart Home Safety Network
Wirelessly interconnect with other First Alert & Onelink devices (sold separately) to create a smart home safety network. When one alarm is triggered, all connected devices will sound off. This alarm is also compatible with Amazon Alexa, so you can ask Alexa to check the status of your Onelink alarm. The Onelink Home App is compatible with both Android and Apple devices.
Voice Alerts and More
Emergency notifications alert you to danger via your phone, while voice and location technology tell you the type and area of danger; the Onelink also uses a traditional 85-decibel siren.
Hardwired Alarm with Easy Setup and Installation
The Onelink Smoke & Carbon Monoxide Alarm connects easily to electrical systems using the included AC adapter plugs so you don't have to rewire (AC power is required for Onelink). Includes a 10 year sealed lithium battery backup so you are always protected even in a power outage.
Battery Backup for Continuous Protection
This Hardwired Onelink Smoke & CO Alarm is equipped with a ten year sealed battery backup for protection during power outages.
Onelink Hardwired Smart Smoke + Carbon Monoxide Alarm (3nd Generation) 1042135
In this guide, we'll be showing you how to install First Alert Hardwired Smoke and Carbon Monoxide Alarms. Here are a few items you'll need before starting the installation process: Needle-nose pliers or utility knife, screwdriver, wire stripper, wire nuts and a ladder.
Hardwired Smoke or Carbon Monoxide Alarm Requirements:
To begin, turn off power at the junction box and connect your alarm to the building's electrical wiring.
|Attach to black wire on power connector|
|Attach to white wire on power connector|
Standalone (single-station) alarm: This wire is not needed; tuck the orange wire into the junction box.
If you are installing more smoke or carbon monoxide alarms, you'll want to repeat the process throughout the building. Interconnected smoke and co alarms must meet all requirements:
The same fuse or circuit breaker must power all interconnected alarms.
Up to 18 compatible detectors can interconnect, with a limit of 12 smoke alarms.
The total length of wire interconnecting the alarms should be less than 1,000 ft. (300 meters). This type of wire is commonly available at hardware and electrical supply stores.
All wiring must conform to all local electrical codes and NFPA 70 (NEC). Refer to NFPA 72, NFPA 101, and your local building code for more information.
Interconnect wiring diagram:
If you have any doubts or reservations about these interconnect requirements, please contact an experienced electrician to install your wiring and hardwired alarms.
Once you've installed your hardwired alarms, you'll want to restore power to the junction box. Under regular operation, the power indicator light on the alarm will shine/blink to indicate that it is receiving AC power.
Here's how you can test standalone or interconnected alarms:
Standalone Alarms: Press and hold the Test/Silence button until the unit triggers an alarm.
Interconnected Alarms: Press and hold the Test/Silence button until the first unit triggers an alarm. All interconnected detectors should sound off. Repeat this process to test each alarm in the interconnected series.
Average score based on 14 reviews
- Reviewed: 02/09/2022 by Mo C
The product came with all the hardware needed for the install. Enrolling it into HomeKit was easy if you strictly follow the instructions. I ran into some trouble and had to reset and start over.
- Reviewed: 01/17/2022 by Andy W
These seem to be very good units, and make a great upgrade from my old ones.
- Reviewed: 01/08/2022 by Michael S
Very impressed with the Onelink, the install, setup and configuration was very quick and easy
- Reviewed: 01/04/2022 by Michael S
The directions were very clear, the installation was simple, the setup and configuration was straightforward. I specifically like the ability to know which alarm was the source of the detection and the remote monitoring when I'm out of the house.
- Reviewed: 11/17/2021 by Kristen D
Purchased the One Link hardwired detector to compliment our Home Kit accessories. Installation was simple as we current have First Alert hardwired detectors - The quick connect harness from our previous detector fit this system. Home Kit setup took longer than installation, but I expected technology issues….Here's to hoping that the detector sits mounted to the ceiling and never needs to be active!!
- Reviewed: 06/22/2021 by Gregory C
Onelink hardwired alarm
Easy to install and set up!
- Reviewed: 10/20/2020 by JAMES DAVISON
Sleek and Minimal
Product is very install to install. We choose it for the sleek and minimal profile.
- Reviewed: 05/15/2020 by John V
installation was pretty easy, hard part was navigating my step ladder into and out of the house. You can launch the OneLink Home app from within AppleHomekit to see detectors status smoke and carbon monoxide and battery status, and you can initiate alarm test from your cellphone. I haven't had a fire yet or a CO alert when not home or even if I was home, but presume those notifications will be delivered to my iPhone. Now if they would only make a OneLink explosive gas detector for natural gas, LP leaks...
- Reviewed: 11/24/2019 by Patrick Whelley
All the parts I needed to hard-wire this unit to my house were in the box. After install using the app to set up WiFi and alerts was just as simple. Setup was easy.
- Reviewed: 02/02/2023 by John R
This item works very well just what I needed so that I get notified of an alarm at my house when I'm not home. This was an upgrade to the system I have in place without replacing every smoke head I have,