Test smoke alarms at least once a month. Press the test button, make sure the alarm sounds, replace batteries as needed, and replace the full alarm when it reaches its end of life.
Quick schedule
- Monthly: press the test button on each smoke alarm.
- As needed: replace batteries when the alarm chirps or the manual says to.
- Every 10 years: replace most smoke alarms unless the label says sooner.
- After failure: replace any alarm that doesn't sound during testing.
Why monthly testing matters
Smoke alarms are easy to ignore because they are quiet until something is wrong. Monthly testing confirms that the alarm can sound and catches dead batteries, disconnected units, and failed alarms.
The test button doesn't simulate every real fire condition. It's still the basic check homeowners can do consistently.
How to test them
- Tell people in the home before testing.
- Press and hold the test button.
- Confirm the alarm sounds loudly.
- If alarms are interconnected, confirm the other alarms sound too.
- Replace batteries or the full alarm if testing fails.
Check placement while you are there
Testing day is a good time to notice missing alarms, painted over alarms, alarms sitting on shelves, or units blocked by furniture. Follow local code and manufacturer placement guidance.
Battery reminders
Some alarms use replaceable batteries. Some use sealed long life batteries. Some are hardwired with backup batteries. Follow the label and manual for your model. Don't remove batteries to stop nuisance alarms and then forget to replace them.
Good maintenance rhythm
- Monthly: test every smoke alarm.
- At testing: check for chirps, damage, age labels, and missing units.
- As needed: replace batteries or failed alarms.
- Every 10 years: replace most smoke alarms.