Have a hot tub that overheats to the point of blistering the insulating cover. Temp sensors have been replaced, Electronics package has been replaced ,accuracy of thermometer/thermostat verified. Disconnected heating element and it still overheats. Cools down when it is completely shut off(big disconnect on the wall) so source of heat is internal to the hot tub. Doesnt make sense to me that the water is being heated through pumping but I guess this is the only thing left. Any ideas would be greatly appreciated.
19 years ago