Tip & How-To about Home Security

Beeping CO detector

If you have an alarm system with a CO detector on it and it is beeping every 5 min or so it needs to be replaced, Contact your security alarm company. CO detectors only last 5 yrs. Note: Nothing will be indicated on keypad so be sure it is part of alarm system or you may be charged if tech comes out. When in doubt call them out. : )

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had customer with CO detector sounding quick double chirp about every five minutes. What is this?


This is not a beeping smoke detector. It is probably a CO detector that was installed by your alarm company. GE model 240-COE will give a double beep every 5.5 minutes when the device reaches end of life. Call your alarm company to have it replaced.

Jun 07, 2014 | Kidde DC Voice-Alert CO and Smoke Alarm

3 Answers

Periodically emits 3 loud beeps. Displays 888.


The CO detectors require replacement of the battery periodically.

Unlike smoke detectors, the detector element itself also requires replacement as well as the battery and is sold as a module with the battery attached.

May 02, 2010 | Kidde Nighthawk Combo Gas/co Detector

2 Answers

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.

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

2 Answers

ademco security system every few min the carbon monoxide two beep


This could also be the ADT C.O. detector. they onlt last 5 Yrs. At that point they will beep every 5min nothing will display on keypad. Unit needs to be replaced.

Sep 13, 2009 | Honeywell 5804 Ademco Wireless Security...

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

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