Though they are a 120VAC device, smoke alarms are required to have a
secondary source of power, which is usually a rechargeable battery.
You may have failing batteries and the screeching is by design warning
you of the failure.
Mike
Home Theatre Guy wrote:
> Smoke Alarms beeping. Any ideas ???
>
>
> Don't think it can be the easy one. low batteries as they are hard
> wired in to the power. They are located in our Stairwell in our
> building. One is right at my door and has a high pitched SCREECH :(
>
> They seem to be going off at the same time one after another. Not all
> of them just some of them.
>
> I was thinking maybe they were left in a TESt mode or something. As
> iam pretty sure Smoke alarms don't make noise till they need to :)
>
>
>
> Any ideas.
>
> Going to call our buildings Strata, people who look after the building
> to get it fixed anyways. Just like to know your thought son the matter
> :)
>
> Thanks.
