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First Alert Onelink 1042136 - User Manual

First Alert Onelink 1042136
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User’s Manual Model: 1042136
Important! Please read carefully and save this document.
This user’s manual contains important information about your combination Smoke and CO Alarm’s operation.
If you are installing this alarm for use by others, you must leave this manual (or a copy of it) with the end user.
Installed On
Replace by

Questions and Answers

  • S
    Sarah MorrisJul 28, 2025
    What to do if my First Alert Security System makes one chirp sound every minute?
    • P
      Paul RodriguezJul 28, 2025
      If your First Alert Security System horn chirps once every minute, it indicates a low battery. Immediately replace the battery; you can order replacement batteries at www.firstalertstore.com.
  • K
    Karen MooreAug 2, 2025
    What to do if First Alert Security System CO alarm keeps going off after silencing?
    • S
      Shelby WilsonAug 2, 2025
      If your First Alert Security System CO alarm goes back into alarm 4 minutes after you silence it, CO levels may indicate a potentially dangerous situation. If you are feeling symptoms of CO poisoning, evacuate your home and call 911 or the Fire Department.
  • A
    austin46Aug 6, 2025
    Why does First Alert Onelink 1042136 CO alarm keep going off?
    • J
      John BrockAug 6, 2025
      If your First Alert Security System CO alarm sounds frequently even though no high levels of CO are revealed in an investigation, the CO alarm may be improperly located. Relocate your alarm. If frequent alarms continue, have your home rechecked for potential CO problems. You may be experiencing an intermittent CO problem.
  • S
    Sharon RobertsonAug 11, 2025
    What does 3 chirps mean on First Alert Security System?
    • M
      Mary SmithAug 12, 2025
      If your First Alert Security System horn chirps three times every minute, the alarm needs to be replaced. Immediately replace and deactivate the alarm.
  • R
    reesechristopherAug 17, 2025
    What to do if First Alert Onelink 1042136 Security System flashes yellow and chirps three times?
    • L
      lyoungAug 17, 2025
      If the First Alert Security System light flashes yellow, the horn sounds three chirps every minute, and the voice says “Detector error,” the device is not working correctly and needs to be replaced. Units under warranty should be returned to the manufacturer for replacement.
  • D
    Daniel FarleyAug 21, 2025
    Why does my First Alert Onelink 1042136 Security System smoke alarm go off when there's no smoke?
    • A
      Allison GillespieAug 21, 2025
      The First Alert Security System smoke alarm may sound even when no smoke is visible because of a non-emergency source like cooking smoke. You can silence the alarm on the app or using the unit button. Also, clean the alarm’s cover with a soft, clean cloth. If unwanted alarms continue, relocate your alarm, as it may be too close to the kitchen, cooking appliance, or steamy bathroom.

Summary

Where to Install Your Alarm

Recommended Placement Guidelines

Guidelines for optimal placement of smoke and CO alarms on walls and ceilings.

Where NOT to Install Your Alarm

Setup and Installation Guide

Wireless Interconnect Feature

Smoke Alarm & Fire Response

CO Alarm & Silence Features

Weekly Testing Procedures

Regular Maintenance Guide

Alarm End of Life Procedures

Understanding Carbon Monoxide

What is CO and its Sources?

Explains what CO is, its common household sources, and its dangers.

CO Poisoning Symptoms

Details the various symptoms of CO poisoning based on exposure levels.

Potential Sources of CO in Homes

CO Alarm Regulatory Standards

Smoke Alarm Regulatory Standards

Troubleshooting Guide

First Alert Onelink 1042136 Specifications

General IconGeneral
TypeSmoke and Carbon Monoxide Alarm
ConnectivityWi-Fi
CompatibilityApple HomeKit
Smart Home ProtocolApple HomeKit
WirelessYes
Voice AlertsYes
Mobile AlertsYes
ColorWhite
Power SourceBattery
Audio Alarm85 dB
Mobile AppOnelink Home

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