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Is your smoke or CO detector constantly chirping or just stopped working? In this step-by-step guide, we show you how to safely remove a failed hardwired unit, test for power, troubleshoot common issues like capacitor drain and dust, and install a new combination detector. Plus, we cover how to use an adapter harness or Wago lever nuts for quick rewiring—and how to confirm the install with a full-function test. #smokedetector #diyhomeprojects #HomeImprovement | Everyday Home Repairs