[curly top]

We have one smoke alarm detector that occasionally beeps 3 times, the others are fine. We purchased a new detector, we dusted the area, we put in new batteries and problem still continues. Anyone know what could be causing this? We don't want to leave the room without a detector which is what other people have done.
Thanks

[roob1]

So you purchased a new detector, and like the old one, it also beeps 3 times?

[asianthree]

Contact the company by email with serial #. They replaced all of ours for free

[Chatbrat]

Blow out the detector with canned air, if your detectors are near 10 years old, replace all of them--they have a service life, also replace all the batteries when you get new smoke detectors with 10 year batteries

[retiredguy123]

If it is a First Alert detector, 3 beeps on regular time intervals indicates that the detector is defective. If you have replaced it with a new detector, I would make sure it is properly plugged in to the base unit. If so, I would return it for a new one. If that doesn't work, you may have a wiring problem with the system that interconnects all of the detectors in your house. To test that, I would plug in another detector from your house that you know is working and see if it still beeps. Another solution would be to buy a 10-year, stand alone detector with a sealed battery. That type does not need to be connected to the house wiring and can be mounted anywhere on the wall.

[villagetinker]

I think you need to reset the system, I had a similar situation about 2 years ago, sorry I forgot the reset instructions. I got these by going to the MFG website and getting the instructions for that model.

[rjm1cc]

I had the same problem. I though it was the smoke detector in the bed room and changed its battery. Beeps came back and it was the detector about two feet away out side of the bedroom.

[retiredguy123]

If the problem is just a weak battery, the detector will only beep once on periodic basis. But, if it is 3 beeps, then the detector is defective, not the battery.

[bagboy]

My guess is the smoke/carbon monoxide combination detector needs replaced. I think they last about 5 years or do.

[retiredguy123]

You may also try turning off the circuit breaker labeled "low voltage" in your electrical panel, then plug in the detector, turn the breaker back on, and then press and hold the detector "test" button.

[JoMar]

Just replaced a battery in one of ours.....my question, why do the batteries always die at 2 AM?

[bilcon]

How about at 2AM the first night in our resale 12 years ago, and I didn't have a ladder or anything to get up that high. Beep Beep Beep Beep until the stores opened the next day. Never thought of turning off the breaker, but I didn't even know if they were hot wired or battery. That will never happen again. My wife still reminds me of it.

[Chatbrat]

They are hard wired & have a battery

[Peter31]

One of your alarms is past its expiration date. That’s what the three beeps indicate. If the are less than five years old you can get a free replacement from maker.. if not u will need to replace the old alarm with new ones..

[bmit16]

You have to reset the system. Look in the instructions that came with the new detector. You may have to reset all the units. It is a hard reset that will return them to factory setting so they do not have to be replaced. I had to do this a while back. This is what manufacture told me to do when I called.