I own a 1997 Cal Spas Premier Series 3 "The Tropical", and it's giving me an error message that says "FLO".
According to the manual, when the "FLO" message is present and not blinking, "A pressure switch has malfunctioned-- call your local service center"
When I turn off the power and turn it back on again, the tub works fine for 24-48 hours, then the message comes up again. I also drained the tub, and after I refilled it, it worked fine for a couple weeks before the "FLO" message came up again.
So, do you really think it's a pressure switch? Is there something I can do on my own? Has anybody else seen this problem?
Thanks!