Please help, I have a sundance spa model sentry 724 it's been working fine until today I decided to change the water and do some cleaning for winter, when I refilled the water and turned on the power, there was a massage on the display indecated ' Flo' and nothing works, any help would be greatly appreciated

Hi TNT,

The pressure switch http://spapartsnet.com/Reference-Catalo ... 4_0_1.html
may be sticking. If the board see's flow from the switch when it is not calling for flow, it must halt on error.

Just a stab in the dark

Hi,

Not a spa tech but most spas operate on the same principal. Recently encountered a FLO warning on my sundance capri display and found a defective circulation pump motor starting capacitor. Replaced same and all works as advertised. Hope this helps.

Cheers,

Len in Baguio