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What does a red light mean on a GFCI?

A red light indicates your GFCI has a potential issue and may need to be replaced. The small LED status indicator light on a GFCI (ground fault circuit interrupter) outlet gives you a convenient way to check the level of ground fault protection at a glance. A red light means that the GFCI outlet needs attention and that there is a potential problem. In this case, simply press the TEST and RESET buttons to reset the GFCI. If the light then turns to green, you are good to go and can use the outlet.

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