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.
SOURCE: kidde nighthawk Carbon Monoxide & Smoke Alarm single beeps
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.
SOURCE: what does an err code E03 mean?
Correct. Intermittent beeping is a sign of "component failure". Time for a new one.
SOURCE: 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.
SOURCE: My Kidde carbon monoxide alarm beeps once every 35
Hi,
1. Change batteries.
2. Clean it.
3. Swap it with another location if you can.
If it still does not work properly consult the local fire dept. for free.
You may have to take it in repairs if all fails.
Cheers
TeaCii
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SOURCE: My nighthawk Kidde carbon monoxide detector keeps
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.
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