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.