Question about Kidde Nighthawk Combo Gas/co Detector

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My Kidde Nighthawk CO2 detector starting beeping every 30 seconds or so this evening with ERR on the display - what does this mean?

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If the display shows "Err", push and hold the Peak Level button. Does the display change to "E09"? If so, then you have just been "had" by the grossly under-documented "planned obsolescence feature" called, rather matter-of-factly, "End of Life". This means that ~7 years after first being powered up, the unit will, BY DESIGN, cease to function, forcing you to buy a replacement. Would have been nice of Kidde to include THAT warning on the OUTSIDE of the package. Call their "Hotline" at 1-800-880-6788 and tell them what you think of that policy. If it is still under warranty (5 or 7 years depending on date of manufacture) they should replace it. In any event, buy another one; if they replace your first one you will have twice the protection. Not a bad thing. *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera"The problem can always be solved with the materials in the room." -My college Physics Lab Instructor

Posted on Feb 01, 2011

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1 Answer

What does err mean on carbon monoixide dectectors


Is it about 7 years old? The chemistry of the sensor is only good for 7 years, so by regulation they are required to have a timer that makes them die at 7 years, after which they are no longer accurate and could mislead you into a fatal CO poisoning. I presume you've already tried replacing the battery.

Jul 08, 2014 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Our kidde battery operated Carbon Monoxide detector is beeping and goes off every 30 seconds. I changed batteries, but it is still beeping. Does that mean there is CO2 or does the unit need to be replaced.


Relocate it to an area of fresh air - outside will work.. Does it still beep?
If yes, recover the new battery and toss the unit.

Do you have it located in a steamy damp area? Laundry room, bath room etc.. That will cause it to malfunction too..

Dec 03, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

I have a NIGHTHAWK CO2 DETTECTOR, it reads ERR & i dont know what it mean?


Should be a Carbon Monoxide detector (CO). The ERR display means the CO sensor is probably shot. Unlike most smoke detectors, CO monitors have a limited life span. Same thing happened to me and had to get a new one.

Oct 18, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

I came home to find my co2 explosive gas detector beeping about 30 sec apart& it had ERR on it. what does that mean? was it going off for too long? is something wrong with it?


If the display shows "Err", push and hold the Peak Level button. Does the display change to "E09"? If so, then you have just been "had" by the grossly under-documented "planned obsolescence feature" called, rather matter-of-factly, "End of Life". This means that ~7 years after first being powered up, the unit will, BY DESIGN, cease to function, forcing you to buy a replacement. Would have been nice of Kidde to include THAT warning on the OUTSIDE of the package. Call their "Hotline" at 1-800-880-6788 and tell them what you think of that policy. If it is still under warranty (5 or 7 years depending on date of manufacture) they should replace it. In any event, buy another one; if they replace your first one you will have twice the protection. Not a bad thing. *Disclaimer: I am not a lawyer, despite the handle. Words to live by: "Every creative act results from a sudden cessation of stupidity." -Edwin H. Land, inventor of the Polaroid Land Camera"The problem can always be solved with the materials in the room." -My college Physics Lab Professor

Oct 11, 2010 | Kidde Nighthawk Combo Gas/co Detector

3 Answers

My Kidde Model # KN-COEG-3 keeps going off and lists 217 now 205 now again 217 and this is with the door open and fresh air coming into my place ??


I took the following from the Kidde website. They only answer the phone Mon-Fri, from 8-5, EST. I checked it out because my almost new Kidde CO detector is showing an Error code.
The next time your carbon monoxide alarm has ERR on the display, push and hold the Peak Level button.You will see an E and an O followed by a number.Contact our hotline at 1-800-880-6788 and provide us the error code, along with the model number, assembly number and date of manufacture from the back of your unit.If your unit is under warranty, a replacement will be mailed to you.

Nov 21, 2009 | Kidde Nighthawk Combo Gas/co Detector

2 Answers

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If detector is more then 5 years old it will beep every 30 seconde to wirn you the sensor in the detector needs to be replaced. bying a new detector would be better.

Sep 21, 2009 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

KIDDE Nighthawk Carbon Monoxide alarm beeping


If detector is more then 5 years old it will beep every 30 seconde to worn you the sensor in the detector needs to be replaced. bying a new detector would be better.

Jun 03, 2009 | Kidde Nighthawk Combo Gas/co Detector

3 Answers

What does an err code E03 mean?


the sense is bad, unfoturally the unit need to be replaced.

Nov 24, 2008 | Kidde Nighthawk Combo Gas/co Detector

4 Answers

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Here is a link to the manual, or you can call the consumer hotline at 1-800-880-6788

Nov 10, 2008 | Kidde Nighthawk Combo Gas/co Detector

9 Answers

Carbon monoxide detector err code


Detecotrs have a limited lifespan of 5-7 years. So sounds like you need new one (It's not worth to buy just a sensor). Take a look on amazon: Amazon com Carbon monoxide detector (watch out on reviews). I hope this was helpful. cheers

Aug 13, 2008 | Kidde Nighthawk Combo Gas/co Detector

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