Hello
We have had the tub since new, have not had any work done recently. When I disconnect the power from the tub the GFCI will not trip. When I disconnect the power to the heater the GFCI still trips. When I disconnect the 4 wires on the power bar for the heater the GFCI sill trips. When I disconnect the temp sensor the GFCI still trips. Any help would be appreciated. Also I have not used a multi meter before or have one, if I need one what size would you recommend to test.