Question about Kidde 4618 Firex Hardwire Ionization Smoke Detector with Battery Backup

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The unit was not chirping but I decided to replace the battery. After I put in the new battery the unit is now chirping.

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Replaced another battery,brand new battery a must,press the test button,by letting it goes off like 30 or 40 sec. so it will detecting the new power of the battery.The chirping,will stop.

Posted on Nov 15, 2010

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Posted on Jan 02, 2017

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Kidde smoke alarm chirping put new batteries in still chirping . Removed alarm and wires are chirping ,can't Believe it !!!! Has anyone else heard of this ?


It will chirp for up to an hour after the battery is replaced. Also make sure the "new" battery is ok, have gotten bad ones in the past several times.

Feb 24, 2017 | Home

1 Answer

My alarm is chirping. I have turned the master electrical switch off, put new batteries in, twice, and disconnected the wires to the SOB, and it still chirps. Help, please.


Check that power is actually coming into the wires with a meter. Clean out any dust. Also did you test the detector after replacing the battery? The chirping also can mean that the detector needs to be replaced.

Dec 06, 2016 | Home

1 Answer

Chirps come from ceiling not unit


Only the smoke detector will chirp. When they begin chirping it means the battery is very low and needs to be replaced. Replace it and you will find the chirping will stop as it will when the battery is totally dead.

Jan 08, 2016 | Home

3 Answers

I have the Firex i4618, after changing the battery it continues to chirp, have tried 2 new Duracell proper model batteries with same result.


Smoke Detecotrs have a limited lifespan of 5-7 years. So sounds like you need new one (Its not worth to buy just a sensor). Take a look on amazon Amazon: Amazon com Smoke Alarm. I hope this helped you. Have a nice day

Jan 06, 2013 | Kidde Firex I4618 Smoke Alarm W/battery...

2 Answers

My new Firex 21007581 with a new battery keeps chirping. What is the problem and how do I fix it? Thanks Sal


He said it had a new battery so he already did that and why would you service a $12 throw away smoke alarm? This FIREX he identified is the 4618 and will also chirp while the LED light blinks, chirp is about 30 seconds after blink if the unit itself needs to be replaced because there is something wrong with it as opposed to a different chirp pattern for battieries. If still unerwarrantee FIREX will replace otherwise go buy a new one.

Sep 07, 2011 | Kidde 21007581 120v Firex 4618 Pro Basic...

1 Answer

3 new Kidde i4618 smoke detectors were put in last week. Last night one of them began chirping. I went to the store and bought brand new batteries and replaced them and tested the units which all worked....


smoke detectors work by smelling the air across a radioactive anode which upsets the electronics and sets off the alarm
it can be set off not only by smoke but by heat and gasses in the air
the new and better product is a photo electric detector which alerts earlier and can be installed connected to each room and into the house power or they come with a 10 years lithium battery
It could be a faulty unit so take it back for a warranty exchange unit

Oct 30, 2017 | Kidde 4618 Firex Hardwire Ionization Smoke...

2 Answers

Replaced 9 v batteries, units still chirping


This is the troubleshooting information from the kddie site. The problem is usually related to an older battery or improperly installed battery. You might also have to do a reset as described below. If battery and cleaning don't work, it might be time for a replacement - short money to keep you and your home safe.

  1. The battery may be loose, or improperly installed.
    Verify that a battery of the recommended type is securely installed. Make sure to use a battery with a use-by date no later than four to five years in the future. Check that the battery is snapped in completely so it cannot be shaken loose. It’s possible that battery connections may not be making good contact with the battery. Disconnecting and re-connecting the battery once or twice will likely fix this condition. On units with a front-load battery, be sure that the battery compartment door is closed completely as well. Loose white neutral wire can cause an echoing chirp. (From one unit to the next)

  2. The smoke alarm sensing chamber may be dirty.
    Dust and insects can collect in the sensing chamber of the alarm. An accumulation of dust in the sensing chamber can cause the unit to chirp. It is good practice to clean the smoke alarm when you change the battery. Static electricity from the ac quick connector attracts dust and can cause false alarms.

    Cleaning smoke alarms:
    To clean your alarm, remove it from the mounting bracket as outlined here. You can clean the interior of your alarm (sensing chamber) by using compressed air or a vacuum cleaner hose and blowing or vacuuming through the openings around the perimeter of the alarm. The outside of the alarm can be wiped with a damp cloth. After cleaning, reinstall your alarm, verify the green LED is on and test your alarm by using the Test Button. If cleaning does not restore the alarm to normal operation, the alarm should be replaced.

  3. Check environmental conditions:
    • Humidity, steam and condensation can cause false alarms. Causes of condensation are:
      • Extreme temperatures changes.
      • High ambient humidity.
      • Unit being installed in an uninsulated electrical box mounted on a ceiling beneath an attic. If this condition exists you’ll want to move the alarm. Click here to see the correct alarm placement in your user’s manual found in our Download Center.
    • Check to see if there is a cooling/heating register, a ceiling fan or an open window within 3 feet of the alarm. If there is, move the alarm away from the source of the increased airflow. Click here to see the correct alarm placement in your user’s manual found in our Download Center.
    • Check the temperature of the room. Smoke alarms operate at 40 degrees to 95 degrees Fahrenheit. Carbon monoxide alarms operate at 40 degrees to 100 degrees Fahrenheit.

  4. Reset the alarm.
    Some current model smoke alarms have a processor that retains certain error conditions, such as a weak battery. The error condition should reset when the battery is replaced but sometimes it does not and must be manually reset to clear the error.

    To reset an AC unit with a battery backup:
    Turn off the power to the smoke alarm at the circuit breaker.Remove the smoke alarm from the mounting bracket and disconnect the power. Remove the battery. Press and hold the test button for at least 15 seconds. The unit may chirp or alarm for a few seconds before going silent.Reconnect the power and reinstall the battery. The unit will chirp once when the power is restored and should not chirp afterwards.

    To reset a DC only unit:
    Remove the battery. Press and hold the test button for at least 15 seconds. The unit may chirp or alarm for a few seconds before going silent.Reinstall the battery. The unit will chirp when the battery is first connected but should not chirp afterwards.

  5. An electrical condition may be causing the power to the unit to be interrupted.
    If the AC power to the unit is interrupted, the unit will chirp when the power is restored. This could be caused by power surges.
    If the chirping seems to occur at about the same time in the evening or morning, it could be due to a surge created when the power company switches electrical grids to meet demand. Check to see if the chirp (or chirping) occurs when something else in the house is turned on such as an exhaust or attic fan, a heater, etc. If the smoke alarm is connected to a circuit with such a device, the alarm may chirp when the other device is switched on. If this is the case and the device is plugged into a wall outlet, move it to another outlet on a different circuit. If it is a hardwired device, have an electrician investigate it. These conditions can be minimized by installing your alarms on a dedicated circuit in compliance with NFPA requirements.

  6. Replace the alarm.
    If none of these conditions exist and the suggestions don't alleviate the symptom, the alarm should be replaced. Age may be a factor. Smoke and heat alarms should be replaced every 10 years, and carbon monoxide and combination alarms should be replaced every 7 years. Most of our alarms have a 5 year warranty from date of purchase (check your user manual for details). A date code is stamped on the label attached to the back of the unit.

Feb 02, 2010 | Kidde 1275 Hardwire Smoke Alarm with Hush...

1 Answer

My alarm is chirping every 30 seconds. This is my second one. no light .


An intermittent chirp usually indicates that the battery needs changing, or a battery needs to be installed. If this is a new unit that came with the battery already inside, there is probably a tab located between the top of the battery and the contacts that needs removing before the unit will stop chirping.

Nov 20, 2009 | Home Security

1 Answer

My First Alert Carbon Monoxide Alarm has failed


If the carbon monoxide detector chirps, the battery may be dead. New batteries can be defective. Check if the light is yellow when the alarm is chirping, it means the battery is low, replace with a new battery.

Warranty service information:

UNITED STATES
BRK Brands, Inc.
3901 Liberty Street Road
Aurora, Illinois 60504
For consumer inquiries call: 800-323-9005

CANADA
Jarden Branded Consumables Canada
88B East ****** Creek, Unit 6
Richmond Hill, Ontario, Canada
L4B 4W2
Tel: 905-482-3720
Fax 905-731-8267
For consumer inquires call: 800-323-9005

If you are looking for new Carbon Monoxide Detectors, visit my website.

Oct 01, 2009 | First Alert Safety & Security Carbon...

1 Answer

Low battery chirping sound: changed battery, but still chirping!!


try a another new battery sometimes they are no good if they where on the store shelf for to long of course the store wont tell you this. if this dosent work replace the unit its better to be safe than sorry


good luck

Dec 10, 2008 | First Alert SA302 Dual System Smoke...

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