What type of maintenance is considered critical for smoke alarms?

Routine testing and battery replacement are critical maintenance tasks for smoke alarms because they ensure that the alarms remain functional and effective in detecting smoke and fire. Smoke alarms can be rendered useless if batteries are dead or if they are not tested regularly to confirm that they are working properly. Regular testing typically involves pressing the test button on the alarm to ensure that it sounds and responds appropriately. Additionally, replacing batteries as recommended—usually at least once a year or when chirping indicates low power—ensures the device is prepared to alert occupants in case of an emergency.

Other maintenance options, such as annual cleaning, may help keep alarms free of dust and debris, but without proper testing and battery checks, a smoke alarm might still fail to function when needed. Replacing electrical wiring and conducting cosmetic updates do not directly enhance the operational reliability of the smoke alarms themselves and might distract from the essential upkeep that guarantees ongoing protection against fires.