re: Smoke detector wont stop beeping every 30 seconds

then I would bet money you're experiencing the same thing I went through. Depending upon your budget you may just want to bite the bullet and replace the entire system with a much more reliable brand.

or you can simply replace them one at a time as they fail with another compatible USI, although you'd understand your replacement is just another piece of garbage that will eventually fail again.

Had this issue with the USI detectors in my house. Got them all completely replaced back in May after having the fire department out to the house to make sure there was no carbon monoxide in the house at 5am. A large # of me neighbors also had to replace theirs. Ours is a new neighborhood with many of the houses less than 3 years old. It was so bad that the store the builders purchased them from stopped carrying the detectors and offered full refunds. I replaced batteries and even took one with me for a ride in the car with a new battery and still got the carbon monoxide alarm.

USI Model #MICN109 was the one giving us all problems. Go look at the reviews on Amazon and you'll see similar complaints. Cheap Chinese crap. We haven't had any issues since replacing them with First Alert units.

quote:

---

the builder of my home installed some piece of shite smoke detectors that all started to fail in succession right around the 4 year mark. I ended up having to replace all of them eventually for false indication and intermittent beeping.

It could be yours just ran itself out of its lifespan and needs to be replaced. google the namebrand/model and see if yours is also a piece of shite variety.

---

This. One of mine did this same thing in our house (new construction) after the 2 year mark. I just trashed it and got a new one at Home Depot.

That’s what I get for being OT poor and going with one of the national builders I guess. I anticipate changing all of them out within the next couple of years.

quote:

---

USI Model #MICN109 was the one giving us all problems.

---

same here

Nest

I don't know what model we have... but I had to deal with this last night. The detectors are all hard wired in electrically and to the alarm system, but they also each have a backup battery (9 volt) in them. I replaced the backup battery and all is well.

What was weird was... it wasn't chirping at a constant rate. It would chirp, then wait 30 seconds, then chirp, then wait 10 minutes then chirp, then wait 5 minutes then chirp, then chirp every 5 seconds for a minute, etc.

When I took it down to replace battery some dust did fall out.

quote:

---

frick the mother fricker who invented hard wired smoke detectors wity double battery backup

---

Agreed.

Throw it in a fire to show it who’s boss.

quote:

---

It is indeed a USI piece of shite

---

Sounds like it's the product, so these steps may not matter. But, might be worth a shot.


1. Turn off the power to the smoke detector at your circuit breaker.

2. Remove the detector from its mounting bracket and unplug the power supply.

3. Remove the battery from the smoke detector.

4. With the battery removed, press and hold the test button for 15-20 seconds.

5. Replace the new battery in the detector and plug in the power supply.

6. Restore power to the circuit breaker.

7. Reattach the breaker to mounting bracket.

quote:

---

the builder of my home installed some piece of shite smoke detectors that all started to fail in succession right around the 4 year mark. I ended up having to replace all of them eventually for false indication and intermittent beeping.

It could be yours just ran itself out of its lifespan and needs to be replaced. google the namebrand/model and see if yours is also a piece of shite variety.

---

this

if they are also CO monitors, they only last about 5 years, so changing the battery won't help


i was lucky enough where mine were being recalled right around the 5 year mark and they sent me 6 new replacments which saved me about 250 bucks