Question about Kidde Nighthawk Combo Gas/co Detector

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I have 2 Kidde nighthawk carbon monoxide Manufactured 12/3/03 plugged in same day. They have no battery back up. They both began chirping within 4 hours of each other. Is there a built in expiration monitor that sets off that chirp after a certain period of time? To coincidental they both went off same day. We called gas company they came they checked the house but they were only chirping. The P + G worker felt there may be a time sensor inside. Have any of you ever heard of that?

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Yes, there is an expiration monitor. The chemical-based sensor degrades and should be replaced every seven years or so. (It's in the instruction manual). I don't know if the monitor is time-based or actually measures an electrical property of the sensor, but in either case, it's replacement time. At this point, the sensor is no long able to detect carbon monoxide.

From the Kidde support page on this topic:
"For quick replacement options, please email or call the Kidde Consumer Hotline at 1-800-880-6788."

Posted on Mar 12, 2011

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1 Answer

My Kidde Carbon monoxide beeps every 30 seconds and is showing L6 with a flash of 0? It is brand new. What does this mean?


L6 is actually "Lb", which is a low battery warning. If the 9V battery is missing, or if the battery's power is low, an "Lb" message will display, which blink's alternately with the current CO reading, while chirping. If this happens, you need to replace the battery.

Nov 10, 2012 | Kidde Nighthawk Combo Gas/co Detector

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We have a Kidde Nighthawk Carbon Monoxide detector. Last week our breaker tripped and ever since then our detector has been beeping once every 15-20 seconds. The detector has a code 97 displayed. We can...


Haha, same thing just happened to me and really scared me. Thats not a '97' that is an upside down 'Lb' for low battery. According to the manual: "A 9V battery is needed. If battery is low or missing while the unit is plugged into a 120V outlet, an "Lb" message will display which will blink alternately with a the CO reading every second and the sounder will chirp every 15 seconds."

Mar 22, 2011 | Kidde Nighthawk Combo Gas/co Detector

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How long does the nighthawk model carbon monoxide detector last for.


I had 2 and they both did the ERR thing and stopped working within a week of each other and that was about 7 years.

Nov 20, 2010 | Kidde Nighthawk Combo Gas/co Detector

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My Kidde Nighthawk Carbon Monoxide detector was beeping shrilly and read gas. When pressed the reset button it read 221. Problem was it was sitting facedown in a box (i'd just taken it from my old...


A reading of 221 ppm carbon monoxide gas is a dangerous level that should be taken seriously. You could try a new battery and reset the detector. If in doubt, always err on the cautious side and have the apartment checked by a professional or by the local fire department.

A new carbon monoxide detector is a small investment that may prevent carbon monoxide poisoning or death.

Jul 22, 2010 | Kidde Nighthawk Combo Gas/co Detector

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My nighthawk Kidde carbon monoxide detector keeps beeping every 25-30 seconds. Do I need to buy a new one?


Some models of Carbon Monoxide Detectors will give an audible beep every 25-30 seconds after it has sounded an alert alarm. This may have happened when there was noone home to hear it. A periodic beeping sound may also indicate it is time to change the battery.

Solution: Install a new battery and check your manual for instructions on how to reset the system. Check the expiry date on your unit, it needs to be replaced after 5 to 7 years, according to the manufacturer specifications.

If you are in doubt that your Carbon Monoxide Detector is not working effectively, REPLACE IT. Your safety and your peace of mind is worth it.
View most Brands and Models of Carbon Monoxide Detectors online.

Jun 27, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Chirp every 30 second


Hi,

There are 2 things you can do:
1. Check and change batteries.
2. Clean them. Ensure they are completely clean.

If that does not work, you can ask the local fire dept. to look into it free.

Other than that you will have to take it in for servicing/repair.

Samsung SHR-2082

Apr 21, 2010 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

I have 7 year old smoke and carbon monoxide alarm...I have put a new replacement battery and detector is chirping every 15 seconds or so


Check the expiry date on this unit. The manufacturer recommends replacement usually after 5 to 7 years depending on the model.

You bought a Combo Gas/CO Detector for protection against the hazards of Gas and Carbon Monoxide poisoning. A new unit will give you the peace of mind you are looking for.

Visit my website for more information and view most Brands and Models of Carbon Monoxide and Combo Gas/CO Detectors.

Dec 20, 2009 | Kidde Nighthawk Combo Gas/co Detector

1 Answer

Nighthawk chirps and displays err


I took the following from the Kidde website. They only answer the phone from 8am-5pm, Mon-Fri, EST.
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 23, 2009 | Kidde Nighthawk Combo Gas/co Detector

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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

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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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