Working smoke alarms, as well as testing your smoke alarms, is very important.. NFPA offers these safety tip sheets.
Smoke alarms (PDF, 219 KB)
Smoke alarms that are properly installed and maintained play a vital role in reducing fire deaths and injuries. You can also download this tip sheet in Spanish (PDF, 441 KB).
Smoke alarms for people who are deaf and hard-of-hearing (PDF, 1.5 MB)
People who are deaf or hard of hearing may not be able to depend on the traditional smoke alarm to alert them to a fire.