The test sound went off. But the fire alarm was 12 years old.

The white, round device on the ceiling.Even though I sleep under it every day, I had never really looked at it.The fire alarm ...

Smoke Alarms: Does a Test Sound Mean You Don't Need to Replace Them? Distinguishing Between 'Operational Checks' and '10-Year Installation Limits'

When was the last time you checked the smoke alarm on your ceiling? If it makes a sound during a test, is that enough to ...