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Why does my GFCI always trip on a massage hot tub?

Humidity and moisture around whirlpools and hot tubs are one of the main reasons why GFCIs frequently trip. Humidity can cause small current leaks even in properly functioning equipment. Water vapor, condensation, or splashing water that enters electrical equipment or cable connections can cause current to conduct to ground through other paths, causing the GFCI to trip.

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