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Guest Michael

Smoke Alarm sounded for 15 sec for no reason

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Guest Michael

Our smoke alarm went off last evening about 4am. Big fright, but appeared to be a false alarm. The alarm went for about 15 sec but than stopped itself. No sign or smell of smoke and no one could have pressed the test button (which only goes for a few seconds).

Does this indicate another issue? How can we fix it? How can we check it is working properly?

Thank you in advance for your help.

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Generally smoke alarms will activate so long as they can sense particles of the right size. (Does not have to be smoke) Since it stopped shortly after starting I would say that what ever it detected is no longer present.

Is it a stand alone detector or are there several interconnected? If they are interconnected did any of the others activate? (I am guessing its a stand alone)

To test a smoke detector most instructions will tell you to "Press the test button, to make sure it activates."

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Guest Michael

Thanks for the response. We have two optical alarms, connected to the main and I believe they are connected to each other. We actually are not sure which one went off as they are in the hallways of the 2nd and 3rd levels of the house. I have tested both and they appear to work with three short sharp beeps after pushing the test button.

I assuming from your response this is not some kind of error indication and would appear to have been set off by something (small insects perhaps). Definetly no smoke or gas smell around either smoke alarm.

Would you suggest a technician perform a check?

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Hi Michael

Other issues to check are:

1) Age of smoke alarms, as they are designed to last for just over ten years. Older alarms become increasingly erratic. There should be a 'replace by' sticker on the alarms.

2) Going off in the night could mean that the sinking temperature affects the battery power, although that usually manifests itself in intermittent low battery warning beeps rather than a full alarm. If the batteries are replaceable it might be worth putting fresh batteries in.

3) Just in case there is dust or insects in the alarm try to vacuum around the central detection chamber.

Harry

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Guest David Croxson

This morning the alarms went off, beeping six times, twice about 30" apart. Since then nothing but it woke the household up! Nothing as far as I can tell triggered them. I have switched the mains off and no chirruping to suggest a low battery in either unit. I have vacuumed each unit and removed a cobweb from one and restored the mains.

Both are in date, (replacement 2016). Any suggestions as to what I can do to check they're not malfunctioning?

I have a EI141 upstairs and EI146 downstairs.

Many thanks

David

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Hi David

I contacted the manufacturer and received a very helpful reply:

'This definitely sounds like contamination inside the sensor of the alarms – most likely the Ei146.

As they have tried cleaning them, we do offer a free of charge inspection/service to the end users, so if they want they can send the heads of the alarms (without batteries) in a jiffy bag along with a covering letter and we will service and return to them usually within 2-3 working days.

The alarms are borderline for this service as we do not service alarms over 8 years old, so if they could return them as soon as then we will get them sorted for them.'

 

Harry

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Guest David Croxson

Thank you, that's a very helpful reply indeed! As far as I know we have not had a repeat of this false alarm, but it's a very worthwhile thing to have done I think. I shall certainly be buying like for like replacement suits if this is the level of service the company offers,

Many thanks

David

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Guest K.Gonzalez

Hi , I just bought  two new BRK ionisation alarms  model 670 MBX to replace the 10 year old ones , I boght the same ones so the base plate and wiring won’t have to be change but now I just replaced them on their place following the battery instructions etc , even reset them for 15 second without the battery etc and when I switch the main power to them .... all hell breaks lose and both won’t stop beeping , if I disconect ether one from the mains the other one is fine and it’s all working , please could you guys help ? Cheers

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Guest James from wv

Ok so commenting on this thread as maybe a help to some. Our smoke alarms are hard wired into our electrical system and was going off constantly. After changing all of the batteries in all 4 alarms, the problem still existed. So I removed the alarms one at a time to check the electrical connections and found 2 alarms to have a loose wires that was causing a fault to set the alarms off with no smoke or fire present. Hope this helps. 

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On 1/4/2018 at 16:54, Guest K.Gonzalez said:

Hi , I just bought  two new BRK ionisation alarms  model 670 MBX to replace the 10 year old ones , I boght the same ones so the base plate and wiring won’t have to be change but now I just replaced them on their place following the battery instructions etc , even reset them for 15 second without the battery etc and when I switch the main power to them .... all hell breaks lose and both won’t stop beeping , if I disconect ether one from the mains the other one is fine and it’s all working , please could you guys help ? Cheers

Since one will work with out the other it would suggest an incompatibility problem.

You say you changed two smoke alarms, are there any more interconnected? if so remove them and put the other new one back to see what happens.

Also make sure the connections are the same at any detector and that there is no junction where the colours could have been swapped.

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Guest Ears Ringing!

We are in a vacation rental, a tiny old house with 11-ft ceilings. Yesterday while cooking one of the battery-operated (stand alone) smoke detectors attached to the ceiling went off (there is no kitchen fan). My husband had to stand on the fridge to take it down! Our concern is there are several others in the small place, all on the ceilings. We don't know what we'll do if one goes off in another room (there's one in the living room only 4 ft away from the kitchen one - it didn't go off thank goodness!). There's no way to reach the others.

If it happens again our only option seems to be leaving the unit, hoping it would eventually turn off. (we didn't want to open the doors to the outside for any length of time to let air in in case a neighbour heard the alarm and called the fire department.)

My question: do battery-operated smoke detector alarms eventually turn off on their own?

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Stand alone battery smoke alarms will continue to sound until the air is clear from smoke or the battery runs flat.

If you can not reach one that has activated for a known reason I can only suggest you "waft" something slightly solid (Folded newspaper at worst) under it to dissipate the smoke.

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