My detector is doing the one churp every 30 seconds which is indication of alarm malfunction. I have had it since Sept 2002. Is there anything I can do to correct this or is it beyone repair? I tried putting new batteries in with no change. when I push button to test it only does the Fire warning . It does not give the carbon Monoxide warning.

Battery is exhausted.

copied from the manual, available at the kidde website

RED AND GREEN LED INDICATORS This smoke alarm features separate red and green LED indicators. The LEDs indicate the following: GREEN LED CONSTANT ON - AC power is present. OFF - AC power is not present. RED LED - Can be seen through the Push-to-Test button. Blinks once a minute - Indicating presence of a working battery. Blinks once a second - Smoke alarm senses smoke and simultaneously sounds an audible alarm. Blinks once every 10 seconds - Smoke alarm is quieting an unwanted alarm (Model ADC only). (Interconnected system only): OFF - Another smoke alarm in the network has sensed smoke and is signalling this alarm.

Normally, that means the battery(s) need changing.. But, hundreds people have had problems with this combo detector, it's hard to predict what it is.

But, as I said earlier, "Normally that means the battery(s) need changing." The keyword here is "Normally".

Good luck. I hope that solves your problem.

They have a timer which means that they chirp after 7 years. You need new ones. 7 years is how long they think they last.

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.

You don't mention how old the detector is. If it is more than 5 years old the detector may be beeping to indicate the end of its service life. A smoke detector can last much longer but carbon monoxide detectors have a limited life span. If putting in new batteries doesn't fix the problem then most likely you will need to replace it.

Depending on manufacturers and such, the catalyst detector element itself may need to be replaced occasionally. Usually cheaper and faster to just get another 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.

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