Finally got the pool clean and ready for the season and got to use it for the first time this past weekend. Monday morning, I woke up and the pool was starting to turn green. I've got a Hayward H-40 generator. I opened the box, and it was still showing 2600 ( salt content) in the display screen, but none of the other indicator lights were on. I turned off the pump, and turned it back on. The no flow light blinked like it usually does when the pump first starts up. It stayed blinking for much longer then normal, and the generating light did not come on. The no flow light went off after about 20 seconds. I turned it back off and on again. This time I flipped the switch to super chlorinate while the no flow light was still blinking. The generate light came on, but turned off after less then 10 seconds. It's almost like the system isn't detecting water flow, and so it isn't generating chlorine. The fuse looks fine. I rinsed off the cell and it looks good. It shouldn't be a wiring sequence issue - nothing has changed, and the system has been working fine for 6 months. When I cycle through the diagnostics, the indicator lights don't come on. Are there some obvious things that I should check, or am I better off just calling a service tech? In the meantime, I'm picking up a few jugs of liquid chlorine today to keep the thing from turning into a swamp. Appreciate your help.