You should be getting error messages like flo or FLO2. check the voltage to the pump from the board if power is there the pump is bad and needs replacing
Heater operates seperate from pumps. Do the pumps come on? Pressure/flow switch turns on heater, so if the pumps work, there is an issue with the heater element, the flow switch will usually prevent the spa from running at all and there will be an error code on the control panel.
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