I have a sundance Marin.. It blows the GFCI break outside more frequently than not....
Some days it comes up to temp and blows... i've tried turning down the temp... still trips the GFCI..
on occasion I can't even reset the breaker as it trips instantly.... other days it resets just fine and the tub turns on till it trips again.... Any idea ? I have the STA manual .. figured first thing i'd try is disconnecting the heater and see if it stays running...(but the heater does work) It just came out of warranty in April... at that time they did a pre end of warranty service and replaced the circulation pump....