The answer to 'why is my GFCI outlet sparking' is that a sparking GFCI outlet is typically a sign of an electrical issue that requires immediate attention. GFCI outlets are designed to quickly shut off the flow of electricity when they detect a ground fault, which can prevent serious electric shocks. However, if the GFCI is sparking, it could indicate a problem with the wiring, the outlet itself, or another electrical component.
Some common causes of a sparking GFCI outlet include a short circuit, a faulty GFCI, moisture or water intrusion, or a problem with the wiring. If the outlet is sparking, it's important to stop using it immediately and call a licensed electrician to diagnose and repair the issue. Attempting to fix a sparking GFCI yourself can be extremely dangerous and should be avoided.