Smoke Detector Maintenance Checklist

Smoke alarms only protect you if they actually work. Dust, dead batteries, bad placement, and expired units all turn a life-saving device into a useless piece of plastic on the ceiling. This checklist keeps your detectors reliable.

For placement rules and sensor differences, review Photoelectric vs. Ionization Alarms.

1. Monthly Testing

• [ ] Press the test button on every alarm
• [ ] Confirm the sound is loud and consistent
• [ ] Verify interconnected alarms activate together (if applicable)

2. Battery Replacement

• [ ] Replace batteries twice a year (unless you have sealed 10-year units)
• [ ] Replace batteries immediately when you hear chirping
• [ ] Use name-brand batteries for longer reliability

3. Cleaning and Dust Removal

• [ ] Vacuum around vents to remove dust buildup
• [ ] Wipe exterior with a dry cloth—no cleaners
• [ ] Keep alarms free from cobwebs

4. Placement and Coverage Check

• [ ] One alarm on every level of the home
• [ ] One inside every bedroom
• [ ] One outside every sleeping area
• [ ] Keep alarms 10 feet from kitchens and bathrooms to reduce false alarms
• [ ] Mount on ceilings or high walls—never low or near vents

5. Age and Replacement

• [ ] Replace smoke detectors every 10 years
• [ ] Replace any unit with yellowing plastic or damaged casing
• [ ] Replace alarms after any major electrical event (surge, lightning strike)

6. Interconnected Systems

• [ ] Ensure wired or wireless interconnects still function
• [ ] Replace weak or intermittent units in a chain
• [ ] Test compatibility if adding new models

7. CO and Combo Alarm Considerations

• [ ] Place CO alarms near sleeping areas
• [ ] Avoid installing CO alarms in kitchens or bathrooms
• [ ] Replace combo units on the CO sensor’s schedule (5–7 years)

8. Documentation and Reminders

• [ ] Write installation date on each alarm
• [ ] Track replacement dates digitally or on calendar
• [ ] Note battery type used for consistency

A working smoke alarm is the cheapest life-saving device you own. This checklist keeps it ready for the one day it actually matters.