As a plug and play tub, the heater will shut off when the Pump is used on high speed. Converting the tub from 120V to 240V will allow the use of the heater and high speed of the pump at the same time. To get the control system converted, a 40A GFCI and gauge copper wire will be required along with some changes that would need to be completed in the control system.
Before any change is made, ensure you have the Spa power OFF. For detailed instructions, click HERE.