Troubleshooting ADT Resideo Smoke and CO Detector

I have an ADT smoke and carbon monoxide detector made by Resideo, model SIXCOMBOVA. Honestly, this is one of the worst products I’ve ever dealt with. Every 4-6 months, the battery dies. I replace it, but no matter what I do, the chirping won’t stop. I’ve called ADT multiple times, gone through all the troubleshooting steps, and every time they give up and send me a brand-new detector. Then, a few months later, the cycle repeats.

I’ve tried searching everywhere for answers, but I haven’t found anything useful. I have three of these detectors in my house, and only the one on the main floor keeps having issues. ADT has sent out technicians, and they always say it’s installed correctly with no concerns. Their only explanation is that it must be a faulty unit.

I’ve used brand-new 123A batteries, and at first, everything seems fine. Then, 8-13 hours later, it starts chirping again.

Anyone have any suggestions? I’m beyond frustrated with this detector. ADT’s customer support and tech support have been useless, and they refuse to swap it out for a different brand.

Photo of the detector

If it’s close to or past the 10-year mark, it might have triggered its ‘end-of-life’ chirp. Some smoke detectors are designed to annoy you into replacing them.

Donald said:
If it’s close to or past the 10-year mark, it might have triggered its ‘end-of-life’ chirp. Some smoke detectors are designed to annoy you into replacing them.

Nope, ADT sends me a brand-new detector every time this happens. This one is only 6-8 months old.

@Ian
That’s ridiculous. I hate dealing with these big alarm companies. When they send you a replacement, do you have to reprogram it yourself, or does ADT do it remotely? Does your panel show any errors when it starts chirping?

@Donald
No errors on the panel at all. ADT has to remote in and pair it, so I can’t even do it myself.

@Ian
It could be ‘new’ but still old stock. Check the manufacturing date on the detector.

ADT might have a warehouse full of them that are already several years old, meaning the battery is already degraded when they send it out.

@Brown
Checked the label—it says good until March 2034, manufactured in October 2024.

I don’t work with Honeywell products, mostly DSC, but usually, if there’s an issue, the panel should show a trouble code. If it’s not, then yeah, sounds like a defective device. Also, 4 x 123A batteries for one detector? That’s insane. I’d push ADT harder to replace it with a different model. Hopefully, someone with Honeywell experience can chime in here.

I had a similar issue with a Kidde detector—replaced it multiple times, same problem. My guess is that ADT bought a bad batch from the factory and keeps sending out units from the same batch.

Also, is this detector near a bathroom? Steam or even warm air from a vent can set some of these off. I moved mine to a different location, and that solved the issue.

@Richards
Nope, it’s in the main floor living room, near the stairs. No vents or anything nearby.