The answer to 'smoke detector sparking' is that a sparking smoke detector is a serious issue that requires immediate attention. Possible causes include a faulty detector, loose wiring, or an electrical short. Symptoms may include visible sparks, flickering lights, or a burning smell.
If your smoke detector is sparking, you should immediately turn off the power to the unit and call a professional electrician. Attempting to repair a sparking smoke detector yourself can be extremely dangerous and could lead to further damage or even a fire. A qualified electrician will be able to safely diagnose and repair the issue, ensuring your home's electrical system is functioning properly and your smoke detectors are working correctly.