I had this problem, posted to the group, and was advised to blow the things
out with compressed air. I did this (ordinary air-compressor air, no fancy
canned air), and it cured the problem. Spider webs are often a problem,
apparently.


"Retiredff" wrote in message
ink.net...


tflfb wrote:
Is there a life expectancy for smoke alarms that are hard wired into
a home.

Today the hard wired smoke alarms went off, nothing burning in the
house.

Any ideas?

Thanks

Tom

If I am not mistaken, it is now suggested they be replaced every ten
years.

Are you sure they do not have a battery back-up? If they don't, it may be
as
simple as blowing they dust out of them, making sure not to cause any
damage
to them.