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#47351 - 01/14/05 09:19 AM Smoke Detectors
dougwells Offline


Registered: 05/03/03
Posts: 1226
Loc: kamloops BC Canada
Got a call today that The Smoke Detectors were activating during the night.There is 4 of them and it seems that this has just started with the cold Temperatures .They are 8 years old, all i could was suggest was to have them replaced.

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#47352 - 01/14/05 09:53 AM Re: Smoke Detectors
hbiss Offline

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
Time to replace them anyway and that will probably take care of the problem. They get dirt and insects inside them, particulary spiders for some reason.


#47353 - 01/14/05 10:13 AM Re: Smoke Detectors
Dave55 Offline

Registered: 05/08/04
Posts: 666
Loc: Crystal Lake, Illinois, USA
They're supposed to be replaced after 10 years anyway, so this is a good opportunity. The last ones I had go off was with a cleaning lady using a vacuum. It was throwing off dust because the bag was full.


#47354 - 01/14/05 12:48 PM Re: Smoke Detectors
Jps1006 Offline

Registered: 01/22/04
Posts: 609
Loc: Northern IL
What you could have is a problem with codensation. If it's conduit, your (his) warm moist house air travelling through the cold attic will cause water to form in the pipe and drip down. If it's romex, I don't know, but I wouldn't rule out condesation.

I have seen this many times where the water shorts out the smoke. That's why I never run conduit straight up out of a wall or ceiling box and extend it into open attic. Always follow the contour of the insulation for as long as you can. If you have to up to an attic light, put a few 90's before you fly. This way any condensation will have a chance to re-evaporate as it warms back up.

#47355 - 01/14/05 06:31 PM Re: Smoke Detectors
Sandro Offline

Registered: 12/30/01
Posts: 449
Loc: Stoney Creek, ON, Canada
I've seen this feature on some models of smoke detectors...the detector's light flashes to alert the HO which detector went off first.

Why replace all of them if only one is faulty?

#47356 - 01/14/05 08:05 PM Re: Smoke Detectors
Dave55 Offline

Registered: 05/08/04
Posts: 666
Loc: Crystal Lake, Illinois, USA
That's interesting, Sandro. Do you know what model?


#47357 - 01/15/05 02:15 PM Re: Smoke Detectors
DougW Offline

Registered: 06/08/03
Posts: 1083
Loc: North Chicago, IL
+1 for the 'condensation trip' advice. Check the detector on the cathedral ceiling first. (longest run / thinnest insulation)

#47358 - 01/15/05 02:32 PM Re: Smoke Detectors
Bill Addiss Offline

Registered: 10/07/00
Posts: 4196
Loc: NY, USA

The Firex Smokes will tell you which one is going off.

This smoke alarm features an LED indicator which can be seen through the Push-to-Test button. The LED indicates the following:

Blinks once a minute — indicating normal operation.

Blinks once a second — smoke alarm senses smoke and simultaneously sounds an audible alarm.

Blinks once approximately every 10 seconds — False Alarm Control™ (FAC) feature activated (model GC only).

OFF — another smoke alarm in the (Interconnected system only): network has sensed smoke and is signalling this alarm.
See Page 5 of:


[This message has been edited by Bill Addiss (edited 01-15-2005).]

#47359 - 01/15/05 02:55 PM Re: Smoke Detectors
Dave55 Offline

Registered: 05/08/04
Posts: 666
Loc: Crystal Lake, Illinois, USA
Thanks Bill!


#47360 - 01/16/05 03:33 PM Re: Smoke Detectors
Wirenuttt Offline

Registered: 11/10/02
Posts: 267
Loc: Massachusetts
I use to tell the H.O to vaccum the smokes once a month, specially if they had a hot air system. Also, for a little more investment, install the photo instead of the ionization type. Photo is less nuisance alarm and I always worried that they would unplug the ION types and forget they were unplugged.


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