Question about Kidde KNCOPP3 Nighthawk Carbon Monoxide Alarm _ Kiddie i9040 Fire Sentry Compact Smoke _ Fire Alarm in a Value Pack with Batteries Included

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I have a number J90 on my detector kiddie night hawk what that means

It was making noise and then the number J90 came up

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Change the battery and see if that fixes it.

Posted on Apr 11, 2015

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My night hawk carbon monoxide reads L6. Then Err.


Lb (rather than L6) indicates a low battery. You need to replace the 9V battery in the carbon monoxide detector. The Err suggests an internal error but could just be due to the low battery.

If the Err persists after you replace the battery, press the peak level button (the right hand button) and check for an additional error code. If the Err message continues, replace the Night Hawk unit. If the unit is still under warranty, contact the manufacturer. Most of these units have a 10 year warranty. There are several models available from Kidde. The manual is available on the product site. For the KN-COPP-3 Night Hawk carbon monoxide detector, the documentation is available here: http://www.kidde.com/home-safety/en/us/products/fire-safety/co-alarms/kn-copp-3/ . Click on the Documents tab. The manual for the KN-COPP-3 999-0100 is here: http://www.utcccs-cdn.com/hvac/docs/2001/Public/06/User_Guide_KN-COPP-3_900-0100.pdf .

I hope this helps.

Cindy Wells

Dec 12, 2016 | Night Home Security

1 Answer

4 beeps with pauses for 2 year old carbon monoxide detector


I'm pretty sure that indicates an alarm. The pattern is referred to as "temporal 4" which is the alarm pattern for CO. Either your device is in a bad place or there is an intermittent CO leak which is exceeding the ppm (parts per million) threshold for a given time period. The instructions for the device will tell you what that number is. If you have more than one of these, I would try swapping them to determine if the problen is with the device or the location. Good luck!

Apr 24, 2015 | Kidde Kiddie - Nighthawk Kn-cob-lcb-a Fire...

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I hve a number J90 on my detector what that means


Kidde AC Plug in Operated Carbon Monoxide AlarmKN COB LCB

The above link is to get a copy of the user guide. However, it does not show anything regarding an error code J90...in fact, I can find no reference to this code on the Kidde website. You would be well-advised to call their support number or contact them through their website: "Call our Product Support Line at 1-800-880-6788 or contact us at our website at www.kidde.com". If you get a definitive answer it would be nice if you would post it here for others to see. Thank you.

Apr 11, 2015 | Kidde Kiddie - Nighthawk Kn-cob-lcb-a Fire...

1 Answer

My kidde AC smoke alarm I12020 chirps at night then come daylight it makes no noise


Most "chirping" is indicative of low batteries. Perhaps your smokes are improperly wired through a light switch? As to locating, try using a piece of tape over the sound port to change the sound; with these problems there are often more than one causing it. Check also to see if you have any CO alarms that were plugged into a switched outlet. Most of these also have battery backup. Good luck!

Mar 08, 2013 | Kidde Kiddie Ac Wire-in Smoke Alarm I12020

1 Answer

I have kidde night hawk carbon alarm what does the numbers 888 mean


When you first power up the unit, you should see three eights (888) on the digital display, indicating the alarm is in the start-up mode and is warming up. The three eights will remain for approximately 20 seconds.

Aug 02, 2012 | Kidde Nighthawk Combo Gas/co Detector

2 Answers

Kiddie fire alarm model I12060, beeps once every


This happened to me, my smoke detector started chipping so I changed the batteries. A few seconds later it started chirping again. The answer is in the way you put the batteries in. The smoke detector allows you to put the batteries in wrong and makes a slight connector. This slight connector tricks the detector into thinking the batteries are weak. Simply turn the batteries around so the fat connector of the battery touches the skinny connector of the device. Mine was, fat side on the right.

Jan 28, 2010 | Kidde i12040 Hardwire Smoke Alarm with...

2 Answers

ERROR CODE L6


possibly low systm battery.......

Oct 17, 2008 | Kidde Nighthawk Combo Gas/co Detector

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