First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)

  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
  • First Alert Smart Onelink Smoke + CO Alarm - Hardwired (1042135)
Onelink Smart Hardwired Smoke + Carbon Monoxide Alarm w/ Ten Year Sealed Battery
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Hardwired Onelink Smart Smoke and Carbon Monoxide Alarm

  • 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor
  • Alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger
  • Conveniently test and silence alarm via Onelink Home App
  • Interconnects with existing traditional hardwired alarms and other Onelink devices (sold separately) to create a smart home safety network. If one detector is triggered, all connected alarms will sound off.
  • Works with Amazon Alexa, so you can ask Alexa to check the status of your Onelink alarm (Alexa device sold separately).
  • Hardwired - Quick and easy installation with included AC adapter plugs
  • Compatible with Apple HomeKit; can be used on both Apple and Android devices
onelink wifi combo alarm with Apple Homekit onelink wifi combo alarm on google play for android

Onelink Smart Smoke + Carbon Monoxide Alarm - AC Power

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

Product Details
  • 2-in-1 Protection: Photoelectric Smoke and Electrochemical CO sensors
  • 10-year sealed battery backup provides continuous protection in the event of a power outage
  • No low battery chirps in the middle of the night
  • 85 decibel Alarm with Voice Alerts
  • Voice with Location - Voice announces programmed location of the unit and danger detected
  • Multicolor Indicator Ring Provides visual indication of various alarm states
  • Wi-Fi and Bluetooth Wireless Interconnect
  • Bluetooth Mesh Network Communication/2 way communication allows alarms to speak with one another
  • Utilization of Wi-Fi allows users to receive emergency notifications
  • Compatibility: Apple HomeKit and Google Play
  • Receive notifications via iPhone, iPad and iPad Touch (Requires iOS 9.0 or later)
  • Meets UL217 and UL2034 Standards for Smoke and CO Alarms
  • 5 Year Limited Warranty
  • Product Weight: 0.75 lbs.
  • Product Dimensions (LxWxH): 5.88 x 1.57 x 5.88 in.
Product Specs
UPC:
029054020321
MPN:
1042135

How to Install First Alert 1042135 Onelink Hardwired Smoke & Carbon Monoxide Alarms:

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:

  • 120V household electrical circuit (unswitched 120VAC)
  • Standard wiring junction box to a 4 in. (10 cm) size, on either the ceiling or wall
  • Selecting an appropriate location to install your smoke and carbon monoxide alarms (see below guidelines for additional information):
    first alert smoke alarm install guide
    • When installing an alarm on the wall, the top edge of an alarm should be placed between 4 in. (100 mm) and 12 in. (300 mm) from the wall/ceiling line.
    • When installing an alarm on the ceiling, place the alarm as close to the center as possible.
    • In either case, install the alarm at least 4 in. (100 mm) from where the wall and ceiling meet.
    • First Alert Smoke Alarm FAQs
    • First Alert Carbon Monoxide Alarm FAQs

Connecting First Alert Hardwired Alarms to 120V Wiring

To begin, turn off power at the junction box and connect your alarm to the building's electrical wiring.

  1. Locate the junction box and turn off power
  2. Remove the power connector from the new alarm's packaging
  3. Using wire nuts, attach the hot (black), neutral (white), and interconnect (orange) wires
first alert smoke alarm hardwired install guide
first alert wired in smoke alarm install guide
Black wire
(hot)
Attach to black wire on power connector
White wire
(neutral)
Attach to white wire on power connector
Orange wire
(interconnect)

Standalone (single-station) alarm: This wire is not needed; tuck the orange wire into the junction box.

Interconnected alarms:

  • Strip 1/2 in. from the orange wire on the connector
  • Use a wire nut to attach it to the orange wire in the junction box (see image below).

Mounting First Alert Hardwired Alarms

  1. Secure the mounting bracket to the ceiling or wall using screws (included in the package)
  2. Insert the power connector into the plug on the back of your alarm
  3. Tuck any hanging wires into the junction box
  4. Position the base of the alarm onto the bracket and turn it clockwise until it's secured
  5. Remove the pull-tab to activate the backup battery
first alert carbon monoxide alarm install guide
first alert smoke and co detector install guide

Installing Additional and/or Interconnecting First Alert Hardwired Alarms

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:

first alert alarm install guide

If you have any doubts or reservations about these interconnect requirements, please contact an experienced electrician to install your wiring and hardwired alarms.


Restoring Power and Testing 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.

Q: What features can I use if Wi-Fi goes out?
A: You will be able to use the alarm functions and bluetooth streaming from a device - Alexa functionality and receiving push notifications require a Wi-Fi connection.

Q: How do I install a First Alert Hardwired Smoke & CO Alarm?
A:
  • Switch off the circuit breaker for the area where you'll be installing the Smart Smoke + CO Alarm.
  • Install the new mounting bracket.
  • Use the included easy adapter to plug your alarm into your home's AC power.
  • Hold the alarm firmly against the mounting bracket.
  • Twist the alarm clockwise until it can't be turned further. You will hear a single loud chirp when mounting is successful. This means the backup battery has been activated.
  • Switch your circuit breaker back on.
  • Check the alarm. It will pulse blue when it's activated and ready to pair with your mobile device.

Q: Can I turn off the night light feature?
A: The LED lights on the Onelink alarm not only provide a nice glow to light up your route, but they also indicate that the alarm is receiving AC power. You can adjust the brightness level of the nightlight through the Onelink app. When you disable the nighlight two LEDs will glow green on the Onelink alarm letting you know that you have AC power. If the LED is turned off, it indicates your alarm is running off of battery backup.

Q: Why can't I change my nightlight color to red in the Onelink Home App?
A: The color red has been reserved for smoke and carbon monoxide emergencies as well as Alexa privacy mode.

Q: Will the Onelink Safe & Sound work with my other smart detectors?
A: The Onelink Safe & Sound will interconnect with most hardwired smoke and CO alarms. This includes all BRK and First Alert alarms and most Kidde, Fyrnetics, Lifesaver and Firex alarms.

Q: What is the distance you need to be within to interact with the Onelink Safe & Sound?
A: You need to be within 15 feet.

Q: Does the Onelink Safe & Sound require rewiring?
A: Included with the Onelink Safe & Sound are easy adaptor plugs, so you do not have to rewire to install your alarm.

Q: Does this device support Alexa?
A: Alexa voice services are not supported, so you can't talk to Alexa with this unit. However, if you have an Echo or similar Alexa-enabled device, you can use Onelink Alexa skills to check in on your detector. The nightlight on the hardwired alarm can also be controlled with Alexa.

Q: Does this product require professional installation?
A: The Onelink Safe & Sound is meant to be a DIY installation. To install, simply remove your current alarm and bracket and install the Onelink Safe & Sound. The app will guide you through the process. Included with the Onelink Safe & Sound are easy adaptor plugs, so you do not have to rewire to install your alarm.

Q: I just installed my Smart Smoke & CO Alarm. Why does it keep beeping and chirping?
A: Sometimes, alarms may beep or "chirp" to let you know that something isn't right. A chirp is quieter and more intermittent than a regular alarm. Chirping is typically caused by improper mounting, a low battery, or alarm end-of-life.

First Alert Onelink Smart Smoke + CO Alarm - Hardwired (1042135) Video
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Customer Reviews

Write A Customer Review Review

4.8

Average score based on 8 reviews

Rating: 4.8/5Rating: 4.8/5Rating: 4.8/5Rating: 4.8/5Rating: 4.8/5
First Alert Onelink Smart Smoke + CO Alarm - Hardwired (1042135) Reviews

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Onelink hardwired alarm

Reviewed: 06/22/2021 by Gregory C

Easy to install and set up!

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Sleek and Minimal

Reviewed: 10/20/2020 by JAMES DAVISON

Product is very install to install. We choose it for the sleek and minimal profile.

Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5

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...

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Easy setup

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.

Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5Rating: 4/5warranty replacement

Reviewed: 07/30/2019 by Curtis Canada

This was a warranty replacement for a dead on arrival battery. Upon installation the original unit started complaining that the battery was low. A quick call to customer service got this unit. Out of eight units this was the only one with an immediate problem.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5follow on purchase

Reviewed: 07/17/2019 by Curtis Canada

This was a follow on purchase to a pair of Onelink smoke & CO alarms. The first pair have been working well for a month so I bought more. Setup was still a bit troubled, but resetting a couple of times got me through it again.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Straightforward setup

Reviewed: 06/18/2019 by Curtis Canada

Despite some confusion, probably stemming from the VPN configuration on my iPhone, the setup of two hardwired alarms was straightforward.

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Almost Perfect

Reviewed: 05/24/2019 by Jose Perez Jr

I love that Onelink works with HomeKit, Apple's smart home platform. I've been able to set up many automations thus far. Setup was somewhat easy. It took several tries to get it to pair. I would also like the nightlight feature to include a motion sensor. So it turns on when you walk by and then turns off when you walk past it.