Electrical Questions? Ask an Electrician Online.
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1) What is the voltage rating of the spa? A combination of 120 & 240 volts or only 240 volts?
2) Have you confirmed voltage at the GFCI LINE side disconnect lugs?
3) Have you also confirmed voltage at the LOAD side of the GFCI disconnect under a "no load" condition?
hi this is John and I'll try to help you if still needed