I cannot say that I've ever done this or known anyone who has, however, I found this helpful step by step on the internet from someone who says it's relatively easy and can be very cost effective:
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If it's solid red it might be indicating a tripped GFCI, if it's flashing it might be defective. When I say might it's because not all GFCI-s have the same type of light or color. Some are lit when o ... read more