Smoke Detector: lifespan, maintenance and replacement

Typical lifespan: 8–10 years (about 10 years).

Maintenance schedule

• Test alarm button — Monthly
• Replace user-replaceable batteries; never open sealed battery units — Per manual & low-battery warning
• Vacuum dust from unit — Every 6 months
• Replace entire unit — Every 10 years

Signs it needs replacing

• Frequent false alarms
• Chirping that continues after new battery
• Yellow discoloration
• Won't respond to test button
• Unit has reached 10 years from manufacture, or the manufacturer’s earlier replacement date

Tips

Install both ionization and photoelectric detectors, or dual-sensor units, for best protection.