What indicates a smoke detector may need replacement?

A smoke detector that has aged more than 10 years typically indicates that it may need replacement. Most smoke detectors have a lifespan of around 10 years, after which their sensitivity can diminish and their reliability may decrease significantly. Manufacturers recommend that, regardless of the performance or condition, smoke detectors be replaced after this period to ensure optimal functionality and safety in case of a fire.

While other signs such as a constantly flashing light might suggest a malfunction or need for maintenance, they do not directly indicate that the device should be replaced immediately. A chirping noise often signals a low battery or the need for maintenance, rather than outright replacement. Additionally, excessive dirt accumulation may require cleaning to restore functionality, but it does not inherently mean that the smoke detector is at the end of its operational life. Thus, a smoke detector's age is a crucial determinant for replacement, emphasizing the importance of regular maintenance and timely replacement to ensure ongoing fire safety.