The answer to 'why is my smoke detector not working' is that there are several common causes, including a dead or disconnected battery, a malfunctioning sensor, or a problem with the electrical wiring. Smoke detectors are essential safety devices, so it's important to troubleshoot and resolve any issues promptly.
Some of the most common symptoms of a non-working smoke detector include the detector not chirping or lighting up when tested, the battery being completely drained, or the detector simply not responding to smoke or test triggers. To resolve the issue, you'll want to first check the battery and replace it if needed. If that doesn't fix the problem, you may need to clean the detector or replace the entire unit.