Autumn marks the beginning of unsettled and stormy weather across the nation. Lightning storms can cause sudden surges of power through your electrical system that overpower the gfi and damage the spa’s circuit board and can mean replacing a circuit board worth several hundred dollars. If it’s safe, turn off power to your spa before lightning strikes begin; this can save the spa’s circuitry, and preserve your pocketbook. Once the storm passes, power for your hot tub can be turned back on. Never turn power on and off while you are standing in the rain.