So you found the culprit but...

What did the particular chirps translate to? Low batt? CO? Smoke?

edit: Are these detectors standalone units or of the interconnected type? The guy who used to do a lot of work for us said they can be a real pain. If one goes off/malfunctions it can mess the others up.

They’re 120 volt combination CO/smoke detectors with battery backup. The chirp is for low battery.

They’re all connected together and you’re right. When the one in the family room went bad the rest of them went crazy. I replaced it and I should probably replace the rest of them as well.

I thought of you and your chirping problem last night as I was about to get into bed and one of the smoke detectors started chirping. Our ceilings are really high, and the detectors are all connected electrically with a battery backup, and you can’t just replace the battery, you have to take the battery out, disconnect the detector from the electric, and press “test” to drain the residual charge, then replace the battery and the detector back onto the ceiling, all while standing on a really tall ladder (that you had to drag over a ton of carp from the far end of the garage). If you don’t do this, the smoke detector keeps chirping, even though the battery is new. And each time you do this, you forget how you did it the time before, so you have to look it up again. Luckily I had managed after the last time to jot the directions down in my journal, so I didn’t have to hunt them up online again. So not nearly as much swearing.

I found out the hard way that hardwired smoke detectors are only supposed to last about 10 years. After that they tend to go nutso. Ours were triggering full on alarms -- always in the middle of the night, of course. And because they're all wired together, whichever one was acting up would set off all the others so every smoke alarm in the house would go off until we found the culprit and silenced it. So if your detectors are older than 10 years and you like your sleep, I'd recommend replacing them all. We are probably due for round 2 of that soon actually. Ugh.

We used to have the interconnected ones. They were always a pain and eventually went nutso.

There are new ones that supposedly don’t need a battery change for 10 years. I don’t know how they manage that. They (or hard-wired) are mandated in NY State by law now.

The 10 year ones have a sealed lithium battery that can't be changed out. You just ditch the detector.

We buy them at Costco; they seem to work just fine.

We have the 10-year non-hardwired, non-interconnected kind as well. They were all install in 2019, so we have a few more years.

Also, I'm pretty sure all those detectors are coded to only cause problems after all residents are asleep...

quote:

Originally posted by ShiroKuro:
We have the 10-year non-hardwired, non-interconnected kind as well. They were all install in 2019, so we have a few more years.

Also, I'm pretty sure all those detectors are coded to only cause problems after all residents are asleep...

No doubt.

My fan is making a clacking sound. I want a nice one of but $$.

quote:

Originally posted by Daniel:
My fan is making a clacking sound. I want a nice one of but $$.

Is it a ceiling fan? May just be unbalanced so a blade is hitting the fixture on every circuit? Tighten blade fasteners?

No, it sits on the floor and makes a racket. I bought a new one from Amazon at the same price point and it was worse.