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Hey there,

I had this problem, do you live in a apartment block? If so, it is most likely connected to a main system, but the individual alarms still have 9v batteries in them to protect against power cuts, this battery is running low and needs replacing Or you can do what I did and just rip them off the ceiling in anger.

Ta, Ensig_Prs

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9y ago
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5mo ago

A single loud beep from a smoke detector typically indicates a low battery or a malfunction in the system. It is recommended to replace the battery first and if the beep continues, consider replacing the smoke detector.

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14y ago

It does it when its out of battery sometimes, or it could be faulty. I'd check the battery if they are OK then i'd get a new Smoke detector.
Vix Xx



I discovered stopping the beeps from my smoke alarm. I bought new battery and was still beeping. So I took the smoke alarm and unplugged it from ceiling. I saw name of company that makes the alarm and searched online for their website. I clicked on Battery link in the website, and it had a News Release dated 2005 (alarm made year 2000), saying what brand battery that had to be used to work at its best. Mine was eveready battery 1222 or 522. But my alarm didn't say that on it's sticker, it had other brands and numbers of battery choices. I would search online for the company name of your alarm and see if any news releases on batteries came out, or you can email the company and ask what exact brand and number of battery should you use. I didn't know the BRAND of a 9 volt battery would make such a big difference, and it did with mine. If none of that works for you, then possibly something else. I am now in peace with mine, whew!!!!! Hope this helps. (Sorry I don't know where to post my answer) Josie :)

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15y ago

Some model, like the 370MBX, has "PAUSE" button. If this button is pressed or accidently pressed, the smoke detector will beep every 45 seconds for 10 minutes.

This happened to me after I replaced the battery for our home's Smoke Detector. After changing the battery, I pressed the test button AND Pause button, thingking that both buttons must be pressed at the same time (silly me, the smoke detector is in high position anyway, hard to see the labels and I read the label on one button, assuming that the other button is the same). As consequence, the Smoke Detector beeps approx. every 45 seconds. I thought the new battery was a bad one, bought 3 brand new batteries, different brands and tried them all, still beeping. Got crazy, jumped on the net and luckily I found the Smoke detector's manual here http://www.sdfirealarms.co.uk/shop/images/pd_instr_smokedetector_670MBX.pdf

Following the instructions, I released the "Pause" button, press the test button only, the Detector works, and stopped beeping.

Hope this may help.

James V, Sydney

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14y ago

If you are referring to an intermittent beeping that is the battery low alarm, there is about a week of life left in the unit.

<<>>

if the smoke is completely gone about 50 secs

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14y ago

Smoke detectors are designed to beep when they need attention. Often beeping means the battery needs to be replaced. If the beeping is only temporary, like when cooking or taking a shower, it may be affected by steam or other vapor. Also smoke detectors should be replaced after 10 years, and some of them will beep to let you know it is time.

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15y ago

Normally when a smoke alarm keeps beeping the battery is low and needs replacing.

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14y ago

Intermittent and repeated beeping from a smoke alarm is generally a sign that the battery is in need of replacing.

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14y ago

that means u need to change the battery in the smoke alarm

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15y ago

Take out the battery.

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Q: What does one single loud beep coming from the smoke detector mean?
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