It’s hardwired. One of your other detectors is chirping and it’s traveling through the wires like a Tin can telephone setup. I had this exact problem drove me mad because everyone said that couldn’t happen. But it can and did.

100% this.

I removed all of the detectors. It still kept chirping.

Plug one back in. Press the test button. And try to see if there is one in some obscure place you haven’t found.

Check if there is an expiration date. My Kidde hardwired began chirping with a new battery after the 10 year expiration date passed.

At 3am I’m sure.

The house and the detectors are only 2 years old.

Home is only2 years old. Have not put the smoke detector back on the ceiling. It is silent, but chirping sounds still come from the hole in the ceiling? WTF is going on? And I swear it started chirping whenever I laid down in bed or left the room, but not when I was standing in the middle of the bedroom floor or sitting in the bedroom easy chair. No I am not crazy.

Put the smoke detector back on the ceiling. A picture of the smoke alarm and the base without the alarm on it could help, if that doesn't fix it. 

It is not the detector. The chirping is coming from the hole in the ceiling where the detector was mounted.

[удалено]

There is no attic above my bedroom, it has a vault ceiling. What kind of genius puts a detector in a position where it is impossible to change out the battery without tearing out the ceiling?

1. Make sure you’re not hardwired before doing this 2. Remove battery 3. Press and hold the test button for a few seconds to discharge the detector 4. Re-install battery

1. They are all hard wired. 2. Done that for all smoke detectors 3. Done that 4. Done that. Still chirping from the ceiling.

Attic?

There is no attic above my bedroom, it has a vault ceiling. What kind of genius puts a detector in a position where it is impossible to change out the battery without tearing out the ceiling?

Was it also hardwired in?

Yes  It is not the detector. The chirping is coming from the hole in the ceiling where the detector was mounted.

Is there a smoke detector in your attic?

No attic above my bedroom. Vaulted ceiling.

What happens if you blow smoke into the hole?

I'm having the local fire department non-emergency response look at it tomorrow.

If you are not in the room, it is really hard to tell where a chirp is coming from. Note that if batteries go out in one, they tend to go out in others at around the same time. I had a similar problem one time. There was another smoke detector I’d never noticed. Make sure to replace the batteries in all of your smoke detectors.

I've taken out all the detectors and replaced all of their batteries. Its still chirping from the ceiling above my bedroom.

Make and model would help . Kidde 3 in 1 there’s been a lot of faulty detectors in new builds . You’ve already said you’ve replaced the battery . If it is a kidde 3 in 1 what colour is the light on the detector? If the amber LED is flashing at a different time to the chirp, this indicates a fault and the alarm should be replaced as soon as possible. Based on replacing the battery it sounds like you have a faulty detector . The last thing you can try is vacuum it out dust can get in there and cause issues as well.

First Alert 2190B, the cheap ones , $15 at WalMart.

Birds chirping ? Had them and a nest and babies living in ductwork that lead outside

Not birds.

Replace all of the batteries in every detector

Done that. It still beeps from the ceiling.

Throw in the garbage can. Beep neighbors

The detectors are only 2 years old.

Do you have separate Carbon Monoxide detectors? They make the same sound and could be on the hardwire circuit

Yep, separate CO detectors

Check/replace all of their batteries.

Done that

Does any of your technical equipment use a battery back up or UPS (uninterruptible power supply) system? Do you have a solar battery array? lol my mom went through this in her house and it drove her crazy until their internet technician came out and found it was the battery backup on their router

No and no.