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Old 07-18-2018, 03:23 PM
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Why do smoke alarms only go off at 3am?!?

So got a call from renters this morning, 4:30a here, 3:30a there. Said smoke alarms were chirping randomly....not just every 2 minutes. Woke everyone up and they asked how to turn off.

Because of this very reason, I replaced all of the old hard-wire, battery backup smoke alarms 2 years ago. Didn't want to get some false alarm due to a unit being too old. I even replace all 9V batteries each year just before the rental season (so 2 months old).

I've done everything I can think of but why oh why, do they want to make noise?? And why is it always between the hours or 1am-5am?!?

Power is known to go out or get sporatic fluctuations, but that's usually in the winter...not much in the summer. So frustrating and felt bad for them.

These were Kiddie ones from HD, if I recall.
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Old 07-18-2018, 03:26 PM
tommurtha tommurtha is offline
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sometimes dust will cause it
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Old 07-18-2018, 03:46 PM
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MattsCraft MattsCraft is offline
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I just replaced mine with combo smoke CO from SAM's - supposed to be 10 year batteries & trash, no replacing batteries! $40 each. I replaced with these as 3 out of 4 older 9V battery detectors failed the smoke test!

I never knew the test button was just for the alarm, has nothing to do with the sensor
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Old 07-18-2018, 03:57 PM
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Quote:
Originally Posted by MattsCraft View Post
I just replaced mine with combo smoke CO from SAM's - supposed to be 10 year batteries & trash, no replacing batteries! $40 each. I replaced with these as 3 out of 4 older 9V battery detectors failed the smoke test!

I never knew the test button was just for the alarm, has nothing to do with the sensor
Definitely an interesting idea. I hate that I tried to fix a potential issue and the result is "not fixed" as planned.

Also, just viewing Kiddie's website...yes, it can get dirty. Other than that, not a lot of definitive reason why. So to fix it, I'll just blow each one out with air and "hope" that fixes it.
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Old 07-18-2018, 04:24 PM
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I used to have the same problem with my hardwired alarms but the putting a new battery would fix it. Only the one that had a low battery would chirp.

The alarms are on a battery test cycle even if they are hardwired.

I used duracell batteries to replace the crappy ones that were installed in them and didn't have any problems after that.
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Old 07-18-2018, 04:52 PM
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Just looking up the First Alert 10 year combo pack....a lot of complaints on false alarms too. Bummer.

So I'll be out there on Saturday so I guess I need to add to the list blowing out each detector and swapping batteries again. I used a Duracell with a silver band around it (I think these are better than standard), last year. This year got some more Duracell batteries from Costco but not silver banded, so I think the basic ones.

I'll try and replace with silver strip this time just in case.

More than anything, I just felt bad for the renters and not having an answer for them.
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Old 07-18-2018, 05:22 PM
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Alarms

Believe it or not, we had a middle of the night event and found a live "shield or stink" bug in the alarm. I now believe dust and bugs can affect sensor (CO and smoke from kidde). I would love to understand the physics behind this. A stink bug can't create a concentration of CO2 or smoke so is it shorting the board?
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Old 07-18-2018, 08:51 PM
XC500mod XC500mod is offline
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I have been on a war against first alert smoke alarms as of late. Why do they only chirp at 3:30 am??

Our house was built in 2012. The smoke alarms are hard wired and we’ve changed the batteries in all of them. Now, they are starting to expire or wear out. They give 3 short chirps when this is the case. So far 4/12 have now expired. No battery change will help.

How is it that smoke alarms begin to expire after 3 years? Why did our previous home smoke alarms not expire? What a joke.
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Old 07-18-2018, 09:24 PM
jgraham37128 jgraham37128 is offline
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We just replaced all of ours with the Nest ones and love them, especially the night light option.
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Old 07-18-2018, 09:28 PM
tommurtha tommurtha is offline
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several of you have mentioned hardwired detectors WITH batteries.. my hardwired ones don't have batteries.. is that new? mandatory back up in case of a power failure?
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