Why does my hot tub have a Flo message?
Why does my hot tub have a Flo message? The message can also be caused by soiled filters, plugged or bad Flow switches or a bad connection from the Flow switch to the PWA. In rare instances a bad PWA could cause a solid FLO message. If the pump checks out try and look at the filter, the circ line, the wiring to the Flow switch and the Flow switch. What to do if your hot tub has a bad flow switch? If there is no water movement in the spa check to see if there is hair or debris...