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 apartment to my new one). Is this an error a sign of low battery or should I be worried?

If your power is restored and it is still happening just replace the batterys

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."

change battery will solve problem

Golding93, you could very well have elevated levels of CO in your home. You should leave your house immediately and call the fire department. However, if your CO alarm is 7 years old, it could also be the alarm's end-of-life warning. Regardless, you should definitely call the fire department to have everything checked out. If you need additional assistance with your CO alarm, please call our customer service line at 1-800-880-6788. Thanks for being a Kidde customer. We appreciate your business!

Crystal Robinson
PR Coordinator
Kidde

You can unplug the unit if it's an AC detector, change the battery for a new one and reset the Carbon Monoxide Detector. If that doen't work, you can have it checked by your local fire department. If the unit is more than 5 years old, it absolutely needs to be replaced.

Whenever in doubt about the efficiency of a carbon monoxide detector, a replacement is recommended. Yes, protection has a price, but a life cannot be replaced.

Read more industry information, buy your next Carbon Monoxide Detector here.

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.

Need new detector

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.

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.

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