I have a Jacuzzi LED Series 2005 ProTech hot tub (model J-325 if I'm not mistaken) with non-functional jets.
Pressing the jets icon on the on-spa control panel causes them to produce an electrical humming noise.
I have had this issue for roughly 6 months and more recently within the past 2 months has this corresponded with an "FL1" error alongside problems with heating, though these issues are inconsistent - sometimes it works, sometimes it doesn't.
Basic solutions such as refilling it and turning it off and on have done nothing.
