Hello, newb here.
We just got our PDC Spa up and running recently (it was a friends, they gave it to us for free because it wasn't working, a simple pump replacement and it was fine) everything was good for a few months, then we sprayed for bugs and our phosphate levels shot through the roof. Finally got the phosphates down and the rest of the chemicals (mostly the bromine) sorted out and then last night the jets stopped working. They were on and running fine for about two cycles then suddenly kicked off. On the keyboard display we got the FL error which I know is a flow error thanks to having airlocked it the very first time I set it up.
The water circulates fine on low speed and the water stays heated but when we turn the jets on it makes a click and then kicks off with the FL error. Any tips, suggestions, or fixes would be greatly appreciated!