The answer to 'flickering GFCI outlet' is that a flickering GFCI (ground fault circuit interrupter) outlet is usually caused by a problem with the electrical wiring or the GFCI device itself. Common causes include a loose connection, a faulty GFCI, or an issue with the circuit that the GFCI is protecting.
Symptoms of a flickering GFCI outlet include the outlet repeatedly tripping or the light on the GFCI blinking on and off. In some cases, the outlet may not trip at all, but the flickering can indicate an underlying problem. If the flickering is accompanied by other electrical issues, such as dimming lights or appliances not working properly, it's a sign that the problem may be more serious.